jquery.fullPage.js

/**
 * fullPage 2.6.1
 * https://github.com/alvarotrigo/fullPage.js
 * MIT licensed
 *
 * Copyright (C) 2015 alvarotrigo.com - A project by Alvaro Trigo
 */

(function($, window, document, Math, undefined) {
    'use strict';

    // keeping central set of classnames and selectors
    var WRAPPER =               'fullpage-wrapper';
    var WRAPPER_SEL =           '.' + WRAPPER;

    // slimscroll
    var SCROLLABLE =            'fp-scrollable';
    var SCROLLABLE_SEL =        '.' + SCROLLABLE;
    var SLIMSCROLL_BAR_SEL =    '.slimScrollBar';
    var SLIMSCROLL_RAIL_SEL =   '.slimScrollRail';

    // util
    var RESPONSIVE =            'fp-responsive';
    var NO_TRANSITION =         'fp-notransition';
    var DESTROYED =             'fp-destroyed';
    var VIEWING_PREFIX =        'fp-viewing';
    var ACTIVE =                'active';
    var ACTIVE_SEL =            '.' + ACTIVE;

    // section
    var SECTION_DEFAULT_SEL =   '.section';
    var SECTION =               'fp-section';
    var SECTION_SEL =           '.' + SECTION;
    var SECTION_ACTIVE_SEL =    SECTION_SEL + ACTIVE_SEL;
    var SECTION_FIRST_SEL =     SECTION_SEL + ':first';
    var SECTION_LAST_SEL =      SECTION_SEL + ':last';
    var TABLE_CELL =            'fp-tableCell';
    var TABLE_CELL_SEL =        '.' + TABLE_CELL;

    // section nav
    var SECTION_NAV =           'fp-nav';
    var SECTION_NAV_SEL =       '#' + SECTION_NAV;
    var SECTION_NAV_TOOLTIP =   'fp-tooltip';
    var SHOW_ACTIVE_TOOLTIP =   'fp-show-active';

    // slide
    var SLIDE_DEFAULT_SEL =     '.slide';
    var SLIDE =                 'fp-slide';
    var SLIDE_SEL =             '.' + SLIDE;
    var SLIDE_ACTIVE_SEL =      SLIDE_SEL + ACTIVE_SEL;
    var SLIDES_WRAPPER =        'fp-slides';
    var SLIDES_WRAPPER_SEL =    '.' + SLIDES_WRAPPER;
    var SLIDES_CONTAINER =      'fp-slidesContainer';
    var SLIDES_CONTAINER_SEL =  '.' + SLIDES_CONTAINER;
    var TABLE =                 'fp-table';
    var TABLE_ACTIVE =          TABLE + ' ' + ACTIVE;

    // slide nav
    var SLIDES_NAV =            'fp-slidesNav';
    var SLIDES_NAV_SEL =        '.' + SLIDES_NAV;
    var SLIDES_NAV_LINK_SEL =   SLIDES_NAV_SEL + ' a';
    var SLIDES_ARROW =          'fp-controlArrow';
    var SLIDES_ARROW_SEL =      '.' + SLIDES_ARROW;
    var SLIDES_PREV =           'fp-prev';
    var SLIDES_PREV_SEL =       '.' + SLIDES_PREV;
    var SLIDES_ARROW_PREV =     SLIDES_ARROW + ' ' + SLIDES_PREV;
    var SLIDES_ARROW_PREV_SEL = SLIDES_ARROW_SEL + SLIDES_PREV_SEL;
    var SLIDES_NEXT =           'fp-next';
    var SLIDES_NEXT_SEL =       '.' + SLIDES_NEXT;
    var SLIDES_ARROW_NEXT =     SLIDES_ARROW + ' ' + SLIDES_NEXT;
    var SLIDES_ARROW_NEXT_SEL = SLIDES_ARROW_SEL + SLIDES_NEXT_SEL;

    var $window = $(window);
    var $document = $(document);

    $.fn.fullpage = function(options) {

        // common jQuery objects
        var $htmlBody = $('html, body');
        var $body = $('body');

        var FP = $.fn.fullpage;
        // Create some defaults, extending them with any options that were provided
        options = $.extend({
            //navigation
            menu: false,
            anchors:[],
            navigation: false,
            navigationPosition: 'right',
            navigationTooltips: [],
            showActiveTooltip: false,
            slidesNavigation: false,
            slidesNavPosition: 'bottom',
            scrollBar: false,

            //scrolling
            css3: true,
            scrollingSpeed: 700,
            autoScrolling: true,
            fitToSection: true,
            easing: 'easeInOutCubic',
            easingcss3: 'ease',
            loopBottom: false,
            loopTop: false,
            loopHorizontal: true,
            continuousVertical: false,
            normalScrollElements: null,
            scrollOverflow: false,
            touchSensitivity: 5,
            normalScrollElementTouchThreshold: 5,

            //Accessibility
            keyboardScrolling: true,
            animateAnchor: true,
            recordHistory: true,

            //design
            controlArrows: true,
            controlArrowColor: '#fff',
            verticalCentered: true,
            resize: false,
            sectionsColor : [],
            paddingTop: 0,
            paddingBottom: 0,
            fixedElements: null,
            responsive: 0,

            //Custom selectors
            sectionSelector: SECTION_DEFAULT_SEL,
            slideSelector: SLIDE_DEFAULT_SEL,


            //events
            afterLoad: null,
            onLeave: null,
            afterRender: null,
            afterResize: null,
            afterReBuild: null,
            afterSlideLoad: null,
            onSlideLeave: null
        }, options);

        displayWarnings();


        //easeInOutCubic animation included in the plugin
        $.extend($.easing,{ easeInOutCubic: function (x, t, b, c, d) {if ((t/=d/2) < 1) return c/2*t*t*t + b;return c/2*((t-=2)*t*t + 2) + b;}});

        //TO BE REMOVED in future versions. Maintained temporaly for backwards compatibility.
        $.extend($.easing,{ easeInQuart: function (x, t, b, c, d) { return c*(t/=d)*t*t*t + b; }});

        FP.setAutoScrolling = function(value, type){
            setVariableState('autoScrolling', value, type);

            var element = $(SECTION_ACTIVE_SEL);

            if(options.autoScrolling && !options.scrollBar){
                $htmlBody.css({
                    'overflow' : 'hidden',
                    'height' : '100%'
                });

                FP.setRecordHistory(options.recordHistory, 'internal');

                //for IE touch devices
                container.css({
                    '-ms-touch-action': 'none',
                    'touch-action': 'none'
                });

                if(element.length){
                    //moving the container up
                    silentScroll(element.position().top);
                }

            }else{
                $htmlBody.css({
                    'overflow' : 'visible',
                    'height' : 'initial'
                });

                FP.setRecordHistory(false, 'internal');

                //for IE touch devices
                container.css({
                    '-ms-touch-action': '',
                    'touch-action': ''
                });

                silentScroll(0);

                //scrolling the page to the section with no animation
                if (element.length) {
                    $htmlBody.scrollTop(element.position().top);
                }
            }

        };

        /**
        * Defines wheter to record the history for each hash change in the URL.
        */
        FP.setRecordHistory = function(value, type){
            setVariableState('recordHistory', value, type);
        };

        /**
        * Defines the scrolling speed
        */
        FP.setScrollingSpeed = function(value, type){
            setVariableState('scrollingSpeed', value, type);
        };

        /**
        * Sets fitToSection
        */
        FP.setFitToSection = function(value, type){
            setVariableState('fitToSection', value, type);
        };

        /**
        * Adds or remove the possiblity of scrolling through sections by using the mouse wheel or the trackpad.
        */
        FP.setMouseWheelScrolling = function (value){
            if(value){
                addMouseWheelHandler();
            }else{
                removeMouseWheelHandler();
            }
        };

        /**
        * Adds or remove the possiblity of scrolling through sections by using the mouse wheel/trackpad or touch gestures.
        * Optionally a second parameter can be used to specify the direction for which the action will be applied.
        *
        * @param directions string containing the direction or directions separated by comma.
        */
        FP.setAllowScrolling = function (value, directions){
            if(typeof directions != 'undefined'){
                directions = directions.replace(' ', '').split(',');
                $.each(directions, function (index, direction){
                    setIsScrollable(value, direction);
                });
            }
            else if(value){
                FP.setMouseWheelScrolling(true);
                addTouchHandler();
            }else{
                FP.setMouseWheelScrolling(false);
                removeTouchHandler();
            }
        };

        /**
        * Adds or remove the possiblity of scrolling through sections by using the keyboard arrow keys
        */
        FP.setKeyboardScrolling = function (value){
            options.keyboardScrolling = value;
        };

        FP.moveSectionUp = function(){
            var prev = $(SECTION_ACTIVE_SEL).prev(SECTION_SEL);

            //looping to the bottom if there's no more sections above
            if (!prev.length && (options.loopTop || options.continuousVertical)) {
                prev = $(SECTION_SEL).last();
            }

            if (prev.length) {
                scrollPage(prev, null, true);
            }
        };

        FP.moveSectionDown = function (){
            var next = $(SECTION_ACTIVE_SEL).next(SECTION_SEL);

            //looping to the top if there's no more sections below
            if(!next.length &&
                (options.loopBottom || options.continuousVertical)){
                next = $(SECTION_SEL).first();
            }

            if(next.length){
                scrollPage(next, null, false);
            }
        };

        FP.moveTo = function (section, slide){
            var destiny = '';

            if(isNaN(section)){
                destiny = $('[data-anchor="'+section+'"]');
            }else{
                destiny = $(SECTION_SEL).eq( (section -1) );
            }

            if (typeof slide !== 'undefined'){
                scrollPageAndSlide(section, slide);
            }else if(destiny.length > 0){
                scrollPage(destiny);
            }
        };

        FP.moveSlideRight = function(){
            moveSlide('next');
        };

        FP.moveSlideLeft = function(){
            moveSlide('prev');
        };

        /**
         * When resizing is finished, we adjust the slides sizes and positions
         */
        FP.reBuild = function(resizing){
            if(container.hasClass(DESTROYED)){ return; }  //nothing to do if the plugin was destroyed

            isResizing = true;

            var windowsWidth = $window.width();
            windowsHeight = $window.height();  //updating global var

            //text and images resizing
            if (options.resize) {
                resizeMe(windowsHeight, windowsWidth);
            }

            $(SECTION_SEL).each(function(){
                var slidesWrap = $(this).find(SLIDES_WRAPPER_SEL);
                var slides = $(this).find(SLIDE_SEL);

                //adjusting the height of the table-cell for IE and Firefox
                if(options.verticalCentered){
                    $(this).find(TABLE_CELL_SEL).css('height', getTableHeight($(this)) + 'px');
                }

                $(this).css('height', windowsHeight + 'px');

                //resizing the scrolling divs
                if(options.scrollOverflow){
                    if(slides.length){
                        slides.each(function(){
                            createSlimScrolling($(this));
                        });
                    }else{
                        createSlimScrolling($(this));
                    }
                }

                //adjusting the position fo the FULL WIDTH slides...
                if (slides.length) {
                    landscapeScroll(slidesWrap, slidesWrap.find(SLIDE_ACTIVE_SEL));
                }
            });

            var activeSection = $(SECTION_ACTIVE_SEL);

            //isn't it the first section?
            if(activeSection.index(SECTION_SEL)){
                //adjusting the position for the current section
                scrollPage(activeSection);
            }

            isResizing = false;
            $.isFunction( options.afterResize ) && resizing && options.afterResize.call(container);
            $.isFunction( options.afterReBuild ) && !resizing && options.afterReBuild.call(container);
        };

        //flag to avoid very fast sliding for landscape sliders
        var slideMoving = false;

        var isTouchDevice = navigator.userAgent.match(/(iPhone|iPod|iPad|Android|playbook|silk|BlackBerry|BB10|Windows Phone|Tizen|Bada|webOS|IEMobile|Opera Mini)/);
        var isTouch = (('ontouchstart' in window) || (navigator.msMaxTouchPoints > 0) || (navigator.maxTouchPoints));
        var container = $(this);
        var windowsHeight = $window.height();
        var isResizing = false;
        var lastScrolledDestiny;
        var lastScrolledSlide;
        var canScroll = true;
        var scrollings = [];
        var nav;
        var isScrollAllowed = { 'up':true, 'down':true, 'left':true, 'right':true };
        var originals = $.extend(true, {}, options); //deep copy

        FP.setAllowScrolling(true);
        container.removeClass(DESTROYED); //in case it was destroyed before initilizing it again

        //if css3 is not supported, it will use jQuery animations
        if(options.css3){
            options.css3 = support3d();
        }

        if($(this).length){
            container.css({
                'height': '100%',
                'position': 'relative'
            });

            //adding a class to recognize the container internally in the code
            container.addClass(WRAPPER);
        }

        //trying to use fullpage without a selector?
        else{
            showError('error', 'Error! Fullpage.js needs to be initialized with a selector. For example: $(\'#myContainer\').fullpage();');
        }

        //adding internal class names to void problem with common ones
        $(options.sectionSelector).each(function(){
            $(this).addClass(SECTION);
        });
        $(options.slideSelector).each(function(){
            $(this).addClass(SLIDE);
        });

        //creating the navigation dots
        if (options.navigation) {
            addVerticalNavigation();
        }

        $(SECTION_SEL).each(function(index){
            var that = $(this);
            var slides = $(this).find(SLIDE_SEL);
            var numSlides = slides.length;

            //if no active section is defined, the 1st one will be the default one
            if(!index && $(SECTION_ACTIVE_SEL).length === 0) {
                $(this).addClass(ACTIVE);
            }

            $(this).css('height', windowsHeight + 'px');

            if(options.paddingTop || options.paddingBottom){
                $(this).css('padding', options.paddingTop  + ' 0 ' + options.paddingBottom + ' 0');
            }

            if (typeof options.sectionsColor[index] !==  'undefined') {
                $(this).css('background-color', options.sectionsColor[index]);
            }

            if (typeof options.anchors[index] !== 'undefined') {
                $(this).attr('data-anchor', options.anchors[index]);

                //activating the menu / nav element on load
                if($(this).hasClass(ACTIVE)){
                    activateMenuAndNav(options.anchors[index], index);
                }
            }

            // if there's any slide
            if (numSlides > 1) {
                var sliderWidth = numSlides * 100;
                var slideWidth = 100 / numSlides;

                slides.wrapAll('<div class="' + SLIDES_CONTAINER + '" />');
                slides.parent().wrap('<div class="' + SLIDES_WRAPPER + '" />');

                $(this).find(SLIDES_CONTAINER_SEL).css('width', sliderWidth + '%');

                if(options.controlArrows){
                    createSlideArrows($(this));
                }

                if(options.slidesNavigation){
                    addSlidesNavigation($(this), numSlides);
                }

                slides.each(function(index) {
                    $(this).css('width', slideWidth + '%');

                    if(options.verticalCentered){
                        addTableClass($(this));
                    }
                });

                var startingSlide = that.find(SLIDE_ACTIVE_SEL);

                //if the slide won#t be an starting point, the default will be the first one
                if(!startingSlide.length){
                    slides.eq(0).addClass(ACTIVE);
                }

                //is there a starting point for a non-starting section?
                else{
                    silentLandscapeScroll(startingSlide);
                }

            }else{
                if(options.verticalCentered){
                    addTableClass($(this));
                }
            }

        }).promise().done(function(){
            FP.setAutoScrolling(options.autoScrolling, 'internal');

            //the starting point is a slide?
            var activeSlide = $(SECTION_ACTIVE_SEL).find(SLIDE_ACTIVE_SEL);

            //the active section isn't the first one? Is not the first slide of the first section? Then we load that section/slide by default.
            if( activeSlide.length &&  ($(SECTION_ACTIVE_SEL).index(SECTION_SEL) !== 0 || ($(SECTION_ACTIVE_SEL).index(SECTION_SEL) === 0 && activeSlide.index() !== 0))){
                silentLandscapeScroll(activeSlide);
            }

            //fixed elements need to be moved out of the plugin container due to problems with CSS3.
            if(options.fixedElements && options.css3){
                $(options.fixedElements).appendTo($body);
            }

            //vertical centered of the navigation + first bullet active
            if(options.navigation){
                nav.css('margin-top', '-' + (nav.height()/2) + 'px');
                nav.find('li').eq($(SECTION_ACTIVE_SEL).index(SECTION_SEL)).find('a').addClass(ACTIVE);
            }

            //moving the menu outside the main container if it is inside (avoid problems with fixed positions when using CSS3 tranforms)
            if(options.menu && options.css3 && $(options.menu).closest(WRAPPER_SEL).length){
                $(options.menu).appendTo($body);
            }

            if(options.scrollOverflow){
                if(document.readyState === 'complete'){
                    createSlimScrollingHandler();
                }
                //after DOM and images are loaded
                $window.on('load', createSlimScrollingHandler);
            }else{
                $.isFunction( options.afterRender ) && options.afterRender.call(container);
            }

            responsive();

            //for animateAnchor:false
            if(!options.animateAnchor){
                //getting the anchor link in the URL and deleting the `#`
                var value =  window.location.hash.replace('#', '').split('/');
                var destiny = value[0];

                if(destiny.length){
                    var section = $('[data-anchor="'+destiny+'"]');

                    if(section.length){
                        if(options.autoScrolling){
                            silentScroll(section.position().top);
                        }
                        else{
                            silentScroll(0);

                            //scrolling the page to the section with no animation
                            $htmlBody.scrollTop(section.position().top);
                        }
                        activateMenuAndNav(destiny, null);

                        $.isFunction( options.afterLoad ) && options.afterLoad.call( section, destiny, (section.index(SECTION_SEL) + 1));

                        //updating the active class
                        section.addClass(ACTIVE).siblings().removeClass(ACTIVE);
                    }
                }
            }

            //setting the class for the body element
            setBodyClass();

            $window.on('load', function() {
                scrollToAnchor();
            });

        });


        /**
        * Creates the control arrows for the given section
        */
        function createSlideArrows(section){
            section.find(SLIDES_WRAPPER_SEL).after('<div class="' + SLIDES_ARROW_PREV + '"></div><div class="' + SLIDES_ARROW_NEXT + '"></div>');

            if(options.controlArrowColor!='#fff'){
                section.find(SLIDES_ARROW_NEXT_SEL).css('border-color', 'transparent transparent transparent '+options.controlArrowColor);
                section.find(SLIDES_ARROW_PREV_SEL).css('border-color', 'transparent '+ options.controlArrowColor + ' transparent transparent');
            }

            if(!options.loopHorizontal){
                section.find(SLIDES_ARROW_PREV_SEL).hide();
            }
        }

        /**
        * Creates a vertical navigation bar.
        */
        function addVerticalNavigation(){
            $body.append('<div id="' + SECTION_NAV + '"><ul></ul></div>');
            nav = $(SECTION_NAV_SEL);

            nav.addClass(function() {
                return options.showActiveTooltip ? SHOW_ACTIVE_TOOLTIP + ' ' + options.navigationPosition : options.navigationPosition;
            });

            for (var i = 0; i < $(SECTION_SEL).length; i++) {
                var link = '';
                if (options.anchors.length) {
                    link = options.anchors[i];
                }

                var li = '<li><a href="#' + link + '"><span></span></a>';

                // Only add tooltip if needed (defined by user)
                var tooltip = options.navigationTooltips[i];

                if (typeof tooltip !== 'undefined' && tooltip !== '') {
                    li += '<div class="' + SECTION_NAV_TOOLTIP + ' ' + options.navigationPosition + '">' + tooltip + '</div>';
                }

                li += '</li>';

                nav.find('ul').append(li);
            }
        }

        function createSlimScrollingHandler(){
            $(SECTION_SEL).each(function(){
                var slides = $(this).find(SLIDE_SEL);

                if(slides.length){
                    slides.each(function(){
                        createSlimScrolling($(this));
                    });
                }else{
                    createSlimScrolling($(this));
                }

            });
            $.isFunction( options.afterRender ) && options.afterRender.call( this);
        }

        var scrollId;
        var scrollId2;
        var isScrolling = false;

        //when scrolling...
        $window.on('scroll', scrollHandler);

        function scrollHandler(){
            var currentSection;

            if(!options.autoScrolling || options.scrollBar){
                var currentScroll = $window.scrollTop();
                var visibleSectionIndex = 0;
                var initial = Math.abs(currentScroll - document.querySelectorAll(SECTION_SEL)[0].offsetTop);

                //taking the section which is showing more content in the viewport
                var sections =  document.querySelectorAll(SECTION_SEL);
                for (var i = 0; i < sections.length; ++i) {
                    var section = sections[i];

                    var current = Math.abs(currentScroll - section.offsetTop);

                    if(current < initial){
                        visibleSectionIndex = i;
                        initial = current;
                    }
                }

                //geting the last one, the current one on the screen
                currentSection = $(sections).eq(visibleSectionIndex);
            }

            if(!options.autoScrolling || options.scrollBar){
                //executing only once the first time we reach the section
                if(!currentSection.hasClass(ACTIVE)){
                    isScrolling = true;
                    var leavingSection = $(SECTION_ACTIVE_SEL);
                    var leavingSectionIndex = leavingSection.index(SECTION_SEL) + 1;
                    var yMovement = getYmovement(currentSection);
                    var anchorLink  = currentSection.data('anchor');
                    var sectionIndex = currentSection.index(SECTION_SEL) + 1;
                    var activeSlide = currentSection.find(SLIDE_ACTIVE_SEL);

                    if(activeSlide.length){
                        var slideAnchorLink = activeSlide.data('anchor');
                        var slideIndex = activeSlide.index();
                    }

                    if(canScroll){
                        currentSection.addClass(ACTIVE).siblings().removeClass(ACTIVE);

                        $.isFunction( options.onLeave ) && options.onLeave.call( leavingSection, leavingSectionIndex, sectionIndex, yMovement);

                        $.isFunction( options.afterLoad ) && options.afterLoad.call( currentSection, anchorLink, sectionIndex);

                        activateMenuAndNav(anchorLink, sectionIndex - 1);

                        if(options.anchors.length){
                            //needed to enter in hashChange event when using the menu with anchor links
                            lastScrolledDestiny = anchorLink;

                            setState(slideIndex, slideAnchorLink, anchorLink, sectionIndex);
                        }
                    }

                    //small timeout in order to avoid entering in hashChange event when scrolling is not finished yet
                    clearTimeout(scrollId);
                    scrollId = setTimeout(function(){
                        isScrolling = false;
                    }, 100);
                }

                if(options.fitToSection){
                    //for the auto adjust of the viewport to fit a whole section
                    clearTimeout(scrollId2);

                    scrollId2 = setTimeout(function(){
                        if(canScroll){
                            //allows to scroll to an active section and
                            //if the section is already active, we prevent firing callbacks
                            if($(SECTION_ACTIVE_SEL).is(currentSection)){
                                isResizing = true;
                            }
                            scrollPage(currentSection);
                            isResizing = false;
                        }
                    }, 1000);
                }
            }
        }


        /**
        * Determines whether the active section or slide is scrollable through and scrolling bar
        */
        function isScrollable(activeSection){
            //if there are landscape slides, we check if the scrolling bar is in the current one or not
            if(activeSection.find(SLIDES_WRAPPER_SEL).length){
                return activeSection.find(SLIDE_ACTIVE_SEL).find(SCROLLABLE_SEL);
            }

            return activeSection.find(SCROLLABLE_SEL);
        }

        /**
        * Determines the way of scrolling up or down:
        * by 'automatically' scrolling a section or by using the default and normal scrolling.
        */
        function scrolling(type, scrollable){
            if (!isScrollAllowed[type]){
                return;
            }
            var check, scrollSection;

            if(type == 'down'){
                check = 'bottom';
                scrollSection = FP.moveSectionDown;
            }else{
                check = 'top';
                scrollSection = FP.moveSectionUp;
            }

            if(scrollable.length > 0 ){
                //is the scrollbar at the start/end of the scroll?
                if(isScrolled(check, scrollable)){
                    scrollSection();
                }else{
                    return true;
                }
            }else{
                // moved up/down
                scrollSection();
            }
        }


        var touchStartY = 0;
        var touchStartX = 0;
        var touchEndY = 0;
        var touchEndX = 0;

        /* Detecting touch events

        * As we are changing the top property of the page on scrolling, we can not use the traditional way to detect it.
        * This way, the touchstart and the touch moves shows an small difference between them which is the
        * used one to determine the direction.
        */
        function touchMoveHandler(event){
            var e = event.originalEvent;

            // additional: if one of the normalScrollElements isn't within options.normalScrollElementTouchThreshold hops up the DOM chain
            if (!checkParentForNormalScrollElement(event.target) && isReallyTouch(e) ) {

                if(options.autoScrolling){
                    //preventing the easing on iOS devices
                    event.preventDefault();
                }

                var activeSection = $(SECTION_ACTIVE_SEL);
                var scrollable = isScrollable(activeSection);

                if (canScroll && !slideMoving) { //if theres any #
                    var touchEvents = getEventsPage(e);

                    touchEndY = touchEvents.y;
                    touchEndX = touchEvents.x;

                    //if movement in the X axys is greater than in the Y and the currect section has slides...
                    if (activeSection.find(SLIDES_WRAPPER_SEL).length && Math.abs(touchStartX - touchEndX) > (Math.abs(touchStartY - touchEndY))) {

                        //is the movement greater than the minimum resistance to scroll?
                        if (Math.abs(touchStartX - touchEndX) > ($window.width() / 100 * options.touchSensitivity)) {
                            if (touchStartX > touchEndX) {
                                if(isScrollAllowed.right){
                                    FP.moveSlideRight(); //next
                                }
                            } else {
                                if(isScrollAllowed.left){
                                    FP.moveSlideLeft(); //prev
                                }
                            }
                        }
                    }

                    //vertical scrolling (only when autoScrolling is enabled)
                    else if(options.autoScrolling){

                        //is the movement greater than the minimum resistance to scroll?
                        if (Math.abs(touchStartY - touchEndY) > ($window.height() / 100 * options.touchSensitivity)) {
                            if (touchStartY > touchEndY) {
                                scrolling('down', scrollable);
                            } else if (touchEndY > touchStartY) {
                                scrolling('up', scrollable);
                            }
                        }
                    }
                }
            }

        }

        /**
         * recursive function to loop up the parent nodes to check if one of them exists in options.normalScrollElements
         * Currently works well for iOS - Android might need some testing
         * @param  {Element} el  target element / jquery selector (in subsequent nodes)
         * @param  {int}     hop current hop compared to options.normalScrollElementTouchThreshold
         * @return {boolean} true if there is a match to options.normalScrollElements
         */
        function checkParentForNormalScrollElement (el, hop) {
            hop = hop || 0;
            var parent = $(el).parent();

            if (hop < options.normalScrollElementTouchThreshold &&
                parent.is(options.normalScrollElements) ) {
                return true;
            } else if (hop == options.normalScrollElementTouchThreshold) {
                return false;
            } else {
                return checkParentForNormalScrollElement(parent, ++hop);
            }
        }

        /**
        * As IE >= 10 fires both touch and mouse events when using a mouse in a touchscreen
        * this way we make sure that is really a touch event what IE is detecting.
        */
        function isReallyTouch(e){
            //if is not IE   ||  IE is detecting `touch` or `pen`
            return typeof e.pointerType === 'undefined' || e.pointerType != 'mouse';
        }

        function touchStartHandler(event){
            var e = event.originalEvent;

            //stopping the auto scroll to adjust to a section
            if(options.fitToSection){
                $htmlBody.stop();
            }

            if(isReallyTouch(e)){
                var touchEvents = getEventsPage(e);
                touchStartY = touchEvents.y;
                touchStartX = touchEvents.x;
            }
        }

        function getAverage(elements, number){
            var sum = 0;

            //taking `number` elements from the end to make the average, if there are not enought, 1
            var lastElements = elements.slice(Math.max(elements.length - number, 1));

            for(var i = 0; i < lastElements.length; i++){
                sum = sum + lastElements[i];
            }

            return Math.ceil(sum/number);
        }

        /**
         * Detecting mousewheel scrolling
         *
         * http://blogs.sitepointstatic.com/examples/tech/mouse-wheel/index.html
         * http://www.sitepoint.com/html5-javascript-mouse-wheel/
         */
        var prevTime = new Date().getTime();

        function MouseWheelHandler(e) {
            var curTime = new Date().getTime();

            if(options.autoScrolling){
                // cross-browser wheel delta
                e = window.event || e;
                var value = e.wheelDelta || -e.deltaY || -e.detail;
                var delta = Math.max(-1, Math.min(1, value));

                //Limiting the array to 150 (lets not waist memory!)
                if(scrollings.length > 149){
                    scrollings.shift();
                }

                //keeping record of the previous scrollings
                scrollings.push(Math.abs(value));

                //preventing to scroll the site on mouse wheel when scrollbar is present
                if(options.scrollBar){
                    e.preventDefault ? e.preventDefault() : e.returnValue = false;
                }

                var activeSection = $(SECTION_ACTIVE_SEL);
                var scrollable = isScrollable(activeSection);

                //time difference between the last scroll and the current one
                var timeDiff = curTime-prevTime;
                prevTime = curTime;

                //haven't they scrolled in a while?
                //(enough to be consider a different scrolling action to scroll another section)
                if(timeDiff > 200){
                    //emptying the array, we dont care about old scrollings for our averages
                    scrollings = [];
                }

                if(canScroll){
                    var averageEnd = getAverage(scrollings, 10);
                    var averageMiddle = getAverage(scrollings, 70);
                    var isAccelerating = averageEnd >= averageMiddle;

                    //to avoid double swipes...
                    if(isAccelerating){
                        //scrolling down?
                        if (delta < 0) {
                            scrolling('down', scrollable);

                        //scrolling up?
                        }else {
                            scrolling('up', scrollable);
                        }
                    }
                }

                return false;
            }

            if(options.fitToSection){
                //stopping the auto scroll to adjust to a section
                $htmlBody.stop();
            }
        }

        function moveSlide(direction){
            var activeSection = $(SECTION_ACTIVE_SEL);
            var slides = activeSection.find(SLIDES_WRAPPER_SEL);

            // more than one slide needed and nothing should be sliding
            if (!slides.length || slideMoving) {
                return;
            }

            var currentSlide = slides.find(SLIDE_ACTIVE_SEL);
            var destiny = null;

            if(direction === 'prev'){
                destiny = currentSlide.prev(SLIDE_SEL);
            }else{
                destiny = currentSlide.next(SLIDE_SEL);
            }

            //isn't there a next slide in the secuence?
            if(!destiny.length){
                //respect loopHorizontal settin
                if (!options.loopHorizontal) return;

                if(direction === 'prev'){
                    destiny = currentSlide.siblings(':last');
                }else{
                    destiny = currentSlide.siblings(':first');
                }
            }

            slideMoving = true;

            landscapeScroll(slides, destiny);
        }

        /**
        * Maintains the active slides in the viewport
        * (Because he `scroll` animation might get lost with some actions, such as when using continuousVertical)
        */
        function keepSlidesPosition(){
            $(SLIDE_ACTIVE_SEL).each(function(){
                silentLandscapeScroll($(this));
            });
        }

        /**
        * Scrolls the site to the given element and scrolls to the slide if a callback is given.
        */
        function scrollPage(element, callback, isMovementUp){
            var dest = element.position();
            if(typeof dest === 'undefined'){ return; } //there's no element to scroll, leaving the function

            //local variables
            var v = {
                element: element,
                callback: callback,
                isMovementUp: isMovementUp,
                dest: dest,
                dtop: dest.top,
                yMovement: getYmovement(element),
                anchorLink: element.data('anchor'),
                sectionIndex: element.index(SECTION_SEL),
                activeSlide: element.find(SLIDE_ACTIVE_SEL),
                activeSection: $(SECTION_ACTIVE_SEL),
                leavingSection: $(SECTION_ACTIVE_SEL).index(SECTION_SEL) + 1,

                //caching the value of isResizing at the momment the function is called
                //because it will be checked later inside a setTimeout and the value might change
                localIsResizing: isResizing
            };

            //quiting when destination scroll is the same as the current one
            if((v.activeSection.is(element) && !isResizing) || (options.scrollBar && $window.scrollTop() === v.dtop)){ return; }

            if(v.activeSlide.length){
                var slideAnchorLink = v.activeSlide.data('anchor');
                var slideIndex = v.activeSlide.index();
            }

            // If continuousVertical && we need to wrap around
            if (options.autoScrolling && options.continuousVertical && typeof (v.isMovementUp) !== "undefined" &&
                ((!v.isMovementUp && v.yMovement == 'up') || // Intending to scroll down but about to go up or
                (v.isMovementUp && v.yMovement == 'down'))) { // intending to scroll up but about to go down

                v = createInfiniteSections(v);
            }

            element.addClass(ACTIVE).siblings().removeClass(ACTIVE);

            //preventing from activating the MouseWheelHandler event
            //more than once if the page is scrolling
            canScroll = false;

            setState(slideIndex, slideAnchorLink, v.anchorLink, v.sectionIndex);

            //callback (onLeave) if the site is not just resizing and readjusting the slides
            $.isFunction(options.onLeave) && !v.localIsResizing && options.onLeave.call(v.activeSection, v.leavingSection, (v.sectionIndex + 1), v.yMovement);

            performMovement(v);

            //flag to avoid callingn `scrollPage()` twice in case of using anchor links
            lastScrolledDestiny = v.anchorLink;

            //avoid firing it twice (as it does also on scroll)
            activateMenuAndNav(v.anchorLink, v.sectionIndex);
        }

        /**
        * Performs the movement (by CSS3 or by jQuery)
        */
        function performMovement(v){
            // using CSS3 translate functionality
            if (options.css3 && options.autoScrolling && !options.scrollBar) {

                var translate3d = 'translate3d(0px, -' + v.dtop + 'px, 0px)';
                transformContainer(translate3d, true);

                setTimeout(function () {
                    afterSectionLoads(v);
                }, options.scrollingSpeed);
            }

            // using jQuery animate
            else{
                var scrollSettings = getScrollSettings(v);

                $(scrollSettings.element).animate(
                    scrollSettings.options,
                options.scrollingSpeed, options.easing).promise().done(function () { //only one single callback in case of animating  `html, body`
                    afterSectionLoads(v);
                });
            }
        }

        /**
        * Gets the scrolling settings depending on the plugin autoScrolling option
        */
        function getScrollSettings(v){
            var scroll = {};

            if(options.autoScrolling && !options.scrollBar){
                scroll.options = { 'top': -v.dtop};
                scroll.element = WRAPPER_SEL;
            }else{
                scroll.options = { 'scrollTop': v.dtop};
                scroll.element = 'html, body';
            }

            return scroll;
        }

        /**
        * Adds sections before or after the current one to create the infinite effect.
        */
        function createInfiniteSections(v){
            // Scrolling down
            if (!v.isMovementUp) {
                // Move all previous sections to after the active section
                $(SECTION_ACTIVE_SEL).after(v.activeSection.prevAll(SECTION_SEL).get().reverse());
            }
            else { // Scrolling up
                // Move all next sections to before the active section
                $(SECTION_ACTIVE_SEL).before(v.activeSection.nextAll(SECTION_SEL));
            }

            // Maintain the displayed position (now that we changed the element order)
            silentScroll($(SECTION_ACTIVE_SEL).position().top);

            // Maintain the active slides visible in the viewport
            keepSlidesPosition();

            // save for later the elements that still need to be reordered
            v.wrapAroundElements = v.activeSection;

            // Recalculate animation variables
            v.dest = v.element.position();
            v.dtop = v.dest.top;
            v.yMovement = getYmovement(v.element);

            return v;
        }

        /**
        * Fix section order after continuousVertical changes have been animated
        */
        function continuousVerticalFixSectionOrder (v) {
            // If continuousVertical is in effect (and autoScrolling would also be in effect then),
            // finish moving the elements around so the direct navigation will function more simply
            if (!v.wrapAroundElements || !v.wrapAroundElements.length) {
                return;
            }

            if (v.isMovementUp) {
                $(SECTION_FIRST_SEL).before(v.wrapAroundElements);
            }
            else {
                $(SECTION_LAST_SEL).after(v.wrapAroundElements);
            }

            silentScroll($(SECTION_ACTIVE_SEL).position().top);

            // Maintain the active slides visible in the viewport
            keepSlidesPosition();
        }


        /**
        * Actions to do once the section is loaded
        */
        function afterSectionLoads (v){
            continuousVerticalFixSectionOrder(v);
            //callback (afterLoad) if the site is not just resizing and readjusting the slides
            $.isFunction(options.afterLoad) && !v.localIsResizing && options.afterLoad.call(v.element, v.anchorLink, (v.sectionIndex + 1));
            canScroll = true;

            setTimeout(function () {
                $.isFunction(v.callback) && v.callback.call(this);
            }, 600);
        }

        /**
        * Scrolls to the anchor in the URL when loading the site
        */
        function scrollToAnchor(){
            //getting the anchor link in the URL and deleting the `#`
            var value =  window.location.hash.replace('#', '').split('/');
            var section = value[0];
            var slide = value[1];

            if(section){  //if theres any #
                scrollPageAndSlide(section, slide);
            }
        }

        //detecting any change on the URL to scroll to the given anchor link
        //(a way to detect back history button as we play with the hashes on the URL)
        $window.on('hashchange', hashChangeHandler);

        function hashChangeHandler(){
            if(!isScrolling){
                var value =  window.location.hash.replace('#', '').split('/');
                var section = value[0];
                var slide = value[1];

                if(section.length){
                    //when moving to a slide in the first section for the first time (first time to add an anchor to the URL)
                    var isFirstSlideMove =  (typeof lastScrolledDestiny === 'undefined');
                    var isFirstScrollMove = (typeof lastScrolledDestiny === 'undefined' && typeof slide === 'undefined' && !slideMoving);

                    /*in order to call scrollpage() only once for each destination at a time
                    It is called twice for each scroll otherwise, as in case of using anchorlinks `hashChange`
                    event is fired on every scroll too.*/
                    if ((section && section !== lastScrolledDestiny) && !isFirstSlideMove || isFirstScrollMove || (!slideMoving && lastScrolledSlide != slide ))  {
                        scrollPageAndSlide(section, slide);
                    }
                }
            }
        }

        /**
         * Sliding with arrow keys, both, vertical and horizontal
         */
        $document.keydown(keydownHandler);

        var keydownId;
        function keydownHandler(e) {
            clearTimeout(keydownId);

            var activeElement = $(document.activeElement);

            if(!activeElement.is('textarea') && !activeElement.is('input') && !activeElement.is('select') &&
                options.keyboardScrolling && options.autoScrolling){
                var keyCode = e.which;

                //preventing the scroll with arrow keys & spacebar & Page Up & Down keys
                var keyControls = [40, 38, 32, 33, 34];
                if($.inArray(keyCode, keyControls) > -1){
                    e.preventDefault();
                }

                keydownId = setTimeout(function(){
                    onkeydown(e);
                },150);
            }
        }

        function onkeydown(e){
            var shiftPressed = e.shiftKey;

            switch (e.which) {
                //up
                case 38:
                case 33:
                    FP.moveSectionUp();
                    break;

                //down
                case 32: //spacebar
                    if(shiftPressed){
                        FP.moveSectionUp();
                        break;
                    }
                case 40:
                case 34:
                    FP.moveSectionDown();
                    break;

                //Home
                case 36:
                    FP.moveTo(1);
                    break;

                //End
                case 35:
                    FP.moveTo( $(SECTION_SEL).length );
                    break;

                //left
                case 37:
                    FP.moveSlideLeft();
                    break;

                //right
                case 39:
                    FP.moveSlideRight();
                    break;

                default:
                    return; // exit this handler for other keys
            }
        }

        //binding the mousemove when the mouse's middle button is released
        container.mousedown(function(e){
            //middle button
            if (e.which == 2){
                oldPageY = e.pageY;
                container.on('mousemove', mouseMoveHandler);
            }
        });

        //unbinding the mousemove when the mouse's middle button is released
        container.mouseup(function(e){
            //middle button
            if (e.which == 2){
                container.off('mousemove');
            }
        });

        /**
        * Detecting the direction of the mouse movement.
        * Used only for the middle button of the mouse.
        */
        var oldPageY = 0;
        function mouseMoveHandler(e){
            // moving up
            if(canScroll){
                if (e.pageY < oldPageY){
                    FP.moveSectionUp();

                // moving downw
                }else if(e.pageY > oldPageY){
                    FP.moveSectionDown();
                }
            }
            oldPageY = e.pageY;
        }

        /**
        * Scrolls to the section when clicking the navigation bullet
        */
        $document.on('click touchstart', SECTION_NAV_SEL + ' a', function(e){
            e.preventDefault();
            var index = $(this).parent().index();
            scrollPage($(SECTION_SEL).eq(index));
        });

        /**
        * Scrolls the slider to the given slide destination for the given section
        */
        $document.on('click touchstart', SLIDES_NAV_LINK_SEL, function(e){
            e.preventDefault();
            var slides = $(this).closest(SECTION_SEL).find(SLIDES_WRAPPER_SEL);
            var destiny = slides.find(SLIDE_SEL).eq($(this).closest('li').index());

            landscapeScroll(slides, destiny);
        });

        if(options.normalScrollElements){
            $document.on('mouseenter', options.normalScrollElements, function () {
                FP.setMouseWheelScrolling(false);
            });

            $document.on('mouseleave', options.normalScrollElements, function(){
                FP.setMouseWheelScrolling(true);
            });
        }

        /**
         * Scrolling horizontally when clicking on the slider controls.
         */
        $(SECTION_SEL).on('click touchstart', SLIDES_ARROW_SEL, function() {
            if ($(this).hasClass(SLIDES_PREV)) {
                FP.moveSlideLeft();
            } else {
                FP.moveSlideRight();
            }
        });

        /**
        * Scrolls horizontal sliders.
        */
        function landscapeScroll(slides, destiny){
            var destinyPos = destiny.position();
            var slidesContainer = slides.find(SLIDES_CONTAINER_SEL).parent();
            var slideIndex = destiny.index();
            var section = slides.closest(SECTION_SEL);
            var sectionIndex = section.index(SECTION_SEL);
            var anchorLink = section.data('anchor');
            var slidesNav = section.find(SLIDES_NAV_SEL);
            var slideAnchor = getSlideAnchor(destiny);

            //caching the value of isResizing at the momment the function is called
            //because it will be checked later inside a setTimeout and the value might change
            var localIsResizing = isResizing;

            if(options.onSlideLeave){
                var prevSlide = section.find(SLIDE_ACTIVE_SEL);
                var prevSlideIndex = prevSlide.index();
                var xMovement = getXmovement(prevSlideIndex, slideIndex);

                //if the site is not just resizing and readjusting the slides
                if(!localIsResizing && xMovement!=='none'){
                    $.isFunction( options.onSlideLeave ) && options.onSlideLeave.call( prevSlide, anchorLink, (sectionIndex + 1), prevSlideIndex, xMovement);
                }
            }

            destiny.addClass(ACTIVE).siblings().removeClass(ACTIVE);

            if(!options.loopHorizontal && options.controlArrows){
                //hidding it for the fist slide, showing for the rest
                section.find(SLIDES_ARROW_PREV_SEL).toggle(slideIndex!==0);

                //hidding it for the last slide, showing for the rest
                section.find(SLIDES_ARROW_NEXT_SEL).toggle(!destiny.is(':last-child'));
            }

            //only changing the URL if the slides are in the current section (not for resize re-adjusting)
            if(section.hasClass(ACTIVE)){
                setState(slideIndex, slideAnchor, anchorLink, sectionIndex);
            }

            var afterSlideLoads = function(){
                //if the site is not just resizing and readjusting the slides
                if(!localIsResizing){
                    $.isFunction( options.afterSlideLoad ) && options.afterSlideLoad.call( destiny, anchorLink, (sectionIndex + 1), slideAnchor, slideIndex);
                }
                //letting them slide again
                slideMoving = false;
            };

            if(options.css3){
                var translate3d = 'translate3d(-' + destinyPos.left + 'px, 0px, 0px)';

                addAnimation(slides.find(SLIDES_CONTAINER_SEL), options.scrollingSpeed>0).css(getTransforms(translate3d));

                setTimeout(function(){
                    afterSlideLoads();
                }, options.scrollingSpeed, options.easing);
            }else{
                slidesContainer.animate({
                    scrollLeft : destinyPos.left
                }, options.scrollingSpeed, options.easing, function() {

                    afterSlideLoads();
                });
            }

            slidesNav.find(ACTIVE_SEL).removeClass(ACTIVE);
            slidesNav.find('li').eq(slideIndex).find('a').addClass(ACTIVE);
        }

        //when resizing the site, we adjust the heights of the sections, slimScroll...
        $window.resize(resizeHandler);

        var previousHeight = windowsHeight;
        var resizeId;
        function resizeHandler(){
            //checking if it needs to get responsive
            responsive();

            // rebuild immediately on touch devices
            if (isTouchDevice) {
                var activeElement = $(document.activeElement);

                //if the keyboard is NOT visible
                if (!activeElement.is('textarea') && !activeElement.is('input') && !activeElement.is('select')) {
                    var currentHeight = $window.height();

                    //making sure the change in the viewport size is enough to force a rebuild. (20 % of the window to avoid problems when hidding scroll bars)
                    if( Math.abs(currentHeight - previousHeight) > (20 * Math.max(previousHeight, currentHeight) / 100) ){
                        FP.reBuild(true);
                        previousHeight = currentHeight;
                    }
                }
            }else{
                //in order to call the functions only when the resize is finished
                //http://stackoverflow.com/questions/4298612/jquery-how-to-call-resize-event-only-once-its-finished-resizing
                clearTimeout(resizeId);

                resizeId = setTimeout(function(){
                    FP.reBuild(true);
                }, 500);
            }
        }

        /**
        * Checks if the site needs to get responsive and disables autoScrolling if so.
        * A class `fp-responsive` is added to the plugin's container in case the user wants to use it for his own responsive CSS.
        */
        function responsive(){
            if(options.responsive){
                var isResponsive = container.hasClass(RESPONSIVE);
                if ($window.width() < options.responsive ){
                    if(!isResponsive){
                        FP.setAutoScrolling(false, 'internal');
                        FP.setFitToSection(false, 'internal');
                        $(SECTION_NAV_SEL).hide();
                        container.addClass(RESPONSIVE);
                    }
                }else if(isResponsive){
                    FP.setAutoScrolling(originals.autoScrolling, 'internal');
                    FP.setFitToSection(originals.autoScrolling, 'internal');
                    $(SECTION_NAV_SEL).show();
                    container.removeClass(RESPONSIVE);
                }
            }
        }

        /**
        * Adds transition animations for the given element
        */
        function addAnimation(element){
            var transition = 'all ' + options.scrollingSpeed + 'ms ' + options.easingcss3;

            element.removeClass(NO_TRANSITION);
            return element.css({
                '-webkit-transition': transition,
                'transition': transition
            });
        }

        /**
        * Remove transition animations for the given element
        */
        function removeAnimation(element){
            return element.addClass(NO_TRANSITION);
        }

        /**
         * Resizing of the font size depending on the window size as well as some of the images on the site.
         */
        function resizeMe(displayHeight, displayWidth) {
            //Standard dimensions, for which the body font size is correct
            var preferredHeight = 825;
            var preferredWidth = 900;

            if (displayHeight < preferredHeight || displayWidth < preferredWidth) {
                var heightPercentage = (displayHeight * 100) / preferredHeight;
                var widthPercentage = (displayWidth * 100) / preferredWidth;
                var percentage = Math.min(heightPercentage, widthPercentage);
                var newFontSize = percentage.toFixed(2);

                $body.css('font-size', newFontSize + '%');
            } else {
                $body.css('font-size', '100%');
            }
        }

        /**
         * Activating the website navigation dots according to the given slide name.
         */
        function activateNavDots(name, sectionIndex){
            if(options.navigation){
                $(SECTION_NAV_SEL).find(ACTIVE_SEL).removeClass(ACTIVE);
                if(name){
                    $(SECTION_NAV_SEL).find('a[href="#' + name + '"]').addClass(ACTIVE);
                }else{
                    $(SECTION_NAV_SEL).find('li').eq(sectionIndex).find('a').addClass(ACTIVE);
                }
            }
        }

        /**
         * Activating the website main menu elements according to the given slide name.
         */
        function activateMenuElement(name){
            if(options.menu){
                $(options.menu).find(ACTIVE_SEL).removeClass(ACTIVE);
                $(options.menu).find('[data-menuanchor="'+name+'"]').addClass(ACTIVE);
            }
        }

        function activateMenuAndNav(anchor, index){
            activateMenuElement(anchor);
            activateNavDots(anchor, index);
        }

        /**
        * Return a boolean depending on whether the scrollable element is at the end or at the start of the scrolling
        * depending on the given type.
        */
        function isScrolled(type, scrollable){
            if(type === 'top'){
                return !scrollable.scrollTop();
            }else if(type === 'bottom'){
                return scrollable.scrollTop() + 1 + scrollable.innerHeight() >= scrollable[0].scrollHeight;
            }
        }

        /**
        * Retuns `up` or `down` depending on the scrolling movement to reach its destination
        * from the current section.
        */
        function getYmovement(destiny){
            var fromIndex = $(SECTION_ACTIVE_SEL).index(SECTION_SEL);
            var toIndex = destiny.index(SECTION_SEL);
            if( fromIndex == toIndex){
                return 'none';
            }
            if(fromIndex > toIndex){
                return 'up';
            }
            return 'down';
        }

        /**
        * Retuns `right` or `left` depending on the scrolling movement to reach its destination
        * from the current slide.
        */
        function getXmovement(fromIndex, toIndex){
            if( fromIndex == toIndex){
                return 'none';
            }
            if(fromIndex > toIndex){
                return 'left';
            }
            return 'right';
        }


        function createSlimScrolling(element){
            //needed to make `scrollHeight` work under Opera 12
            element.css('overflow', 'hidden');

            //in case element is a slide
            var section = element.closest(SECTION_SEL);
            var scrollable = element.find(SCROLLABLE_SEL);
            var contentHeight;

            //if there was scroll, the contentHeight will be the one in the scrollable section
            if(scrollable.length){
                contentHeight = scrollable.get(0).scrollHeight;
            }else{
                contentHeight = element.get(0).scrollHeight;
                if(options.verticalCentered){
                    contentHeight = element.find(TABLE_CELL_SEL).get(0).scrollHeight;
                }
            }

            var scrollHeight = windowsHeight - parseInt(section.css('padding-bottom')) - parseInt(section.css('padding-top'));

            //needs scroll?
            if ( contentHeight > scrollHeight) {
                //was there already an scroll ? Updating it
                if(scrollable.length){
                    scrollable.css('height', scrollHeight + 'px').parent().css('height', scrollHeight + 'px');
                }
                //creating the scrolling
                else{
                    if(options.verticalCentered){
                        element.find(TABLE_CELL_SEL).wrapInner('<div class="' + SCROLLABLE + '" />');
                    }else{
                        element.wrapInner('<div class="' + SCROLLABLE + '" />');
                    }

                    element.find(SCROLLABLE_SEL).slimScroll({
                        allowPageScroll: true,
                        height: scrollHeight + 'px',
                        size: '10px',
                        alwaysVisible: true
                    });
                }
            }

            //removing the scrolling when it is not necessary anymore
            else{
                removeSlimScroll(element);
            }

            //undo
            element.css('overflow', '');
        }

        function removeSlimScroll(element){
            element.find(SCROLLABLE_SEL).children().first().unwrap().unwrap();
            element.find(SLIMSCROLL_BAR_SEL).remove();
            element.find(SLIMSCROLL_RAIL_SEL).remove();
        }

        function addTableClass(element){
            element.addClass(TABLE).wrapInner('<div class="' + TABLE_CELL + '" style="height:' + getTableHeight(element) + 'px;" />');
        }

        function getTableHeight(element){
            var sectionHeight = windowsHeight;

            if(options.paddingTop || options.paddingBottom){
                var section = element;
                if(!section.hasClass(SECTION)){
                    section = element.closest(SECTION_SEL);
                }

                var paddings = parseInt(section.css('padding-top')) + parseInt(section.css('padding-bottom'));
                sectionHeight = (windowsHeight - paddings);
            }

            return sectionHeight;
        }

        /**
        * Adds a css3 transform property to the container class with or without animation depending on the animated param.
        */
        function transformContainer(translate3d, animated){
            if(animated){
                addAnimation(container);
            }else{
                removeAnimation(container);
            }

            container.css(getTransforms(translate3d));

            //syncronously removing the class after the animation has been applied.
            setTimeout(function(){
                container.removeClass(NO_TRANSITION);
            },10);
        }


        /**
        * Scrolls to the given section and slide
        */
        function scrollPageAndSlide(destiny, slide){
            var section;

            if (typeof slide === 'undefined') {
                slide = 0;
            }

            if(isNaN(destiny)){
                section = $('[data-anchor="'+destiny+'"]');
            }else{
                section = $(SECTION_SEL).eq( (destiny -1) );
            }


            //we need to scroll to the section and then to the slide
            if (destiny !== lastScrolledDestiny && !section.hasClass(ACTIVE)){
                scrollPage(section, function(){
                    scrollSlider(section, slide);
                });
            }
            //if we were already in the section
            else{
                scrollSlider(section, slide);
            }
        }

        /**
        * Scrolls the slider to the given slide destination for the given section
        */
        function scrollSlider(section, slide){
            if(typeof slide != 'undefined'){
                var slides = section.find(SLIDES_WRAPPER_SEL);
                var destiny =  slides.find('[data-anchor="'+slide+'"]');

                if(!destiny.length){
                    destiny = slides.find(SLIDE_SEL).eq(slide);
                }

                if(destiny.length){
                    landscapeScroll(slides, destiny);
                }
            }
        }

        /**
        * Creates a landscape navigation bar with dots for horizontal sliders.
        */
        function addSlidesNavigation(section, numSlides){
            section.append('<div class="' + SLIDES_NAV + '"><ul></ul></div>');
            var nav = section.find(SLIDES_NAV_SEL);

            //top or bottom
            nav.addClass(options.slidesNavPosition);

            for(var i=0; i< numSlides; i++){
                nav.find('ul').append('<li><a href="#"><span></span></a></li>');
            }

            //centering it
            nav.css('margin-left', '-' + (nav.width()/2) + 'px');

            nav.find('li').first().find('a').addClass(ACTIVE);
        }


        /**
        * Sets the state of the website depending on the active section/slide.
        * It changes the URL hash when needed and updates the body class.
        */
        function setState(slideIndex, slideAnchor, anchorLink, sectionIndex){
            var sectionHash = '';

            if(options.anchors.length){

                //isn't it the first slide?
                if(slideIndex){
                    if(typeof anchorLink !== 'undefined'){
                        sectionHash = anchorLink;
                    }

                    //slide without anchor link? We take the index instead.
                    if(typeof slideAnchor === 'undefined'){
                        slideAnchor = slideIndex;
                    }

                    lastScrolledSlide = slideAnchor;
                    setUrlHash(sectionHash + '/' + slideAnchor);

                //first slide won't have slide anchor, just the section one
                }else if(typeof slideIndex !== 'undefined'){
                    lastScrolledSlide = slideAnchor;
                    setUrlHash(anchorLink);
                }

                //section without slides
                else{
                    setUrlHash(anchorLink);
                }
            }

            setBodyClass();
        }

        /**
        * Sets the URL hash.
        */
        function setUrlHash(url){
            if(options.recordHistory){
                location.hash = url;
            }else{
                //Mobile Chrome doesn't work the normal way, so... lets use HTML5 for phones :)
                if(isTouchDevice || isTouch){
                    history.replaceState(undefined, undefined, '#' + url);
                }else{
                    var baseUrl = window.location.href.split('#')[0];
                    window.location.replace( baseUrl + '#' + url );
                }
            }
        }

        /**
        * Gets the anchor for the given slide. Its index will be used if there's none.
        */
        function getSlideAnchor(slide){
            var slideAnchor = slide.data('anchor');
            var slideIndex = slide.index(SLIDE_SEL);

            //Slide without anchor link? We take the index instead.
            if(typeof slideAnchor === 'undefined'){
                slideAnchor = slideIndex;
            }

            return slideAnchor;
        }

        /**
        * Sets a class for the body of the page depending on the active section / slide
        */
        function setBodyClass(){
            var section = $(SECTION_ACTIVE_SEL);
            var slide = section.find(SLIDE_ACTIVE_SEL);

            var sectionAnchor = section.data('anchor');
            var slideAnchor = getSlideAnchor(slide);

            var sectionIndex = section.index(SECTION_SEL);

            var text = String(sectionIndex);

            if(options.anchors.length){
                text = sectionAnchor;
            }

            if(slide.length){
                text = text + '-' + slideAnchor;
            }

            //changing slash for dash to make it a valid CSS style
            text = text.replace('/', '-').replace('#','');

            //removing previous anchor classes
            $body[0].className = $body[0].className.replace(/\b\s?fp-viewing-[^\s]+\b/g, '');

            //adding the current anchor
            $body.addClass(VIEWING_PREFIX + text);
        }

        /**
        * Checks for translate3d support
        * @return boolean
        * http://stackoverflow.com/questions/5661671/detecting-transform-translate3d-support
        */
        function support3d() {
            var el = document.createElement('p'),
                has3d,
                transforms = {
                    'webkitTransform':'-webkit-transform',
                    'OTransform':'-o-transform',
                    'msTransform':'-ms-transform',
                    'MozTransform':'-moz-transform',
                    'transform':'transform'
                };

            // Add it to the body to get the computed style.
            document.body.insertBefore(el, null);

            for (var t in transforms) {
                if (el.style[t] !== undefined) {
                    el.style[t] = 'translate3d(1px,1px,1px)';
                    has3d = window.getComputedStyle(el).getPropertyValue(transforms[t]);
                }
            }

            document.body.removeChild(el);

            return (has3d !== undefined && has3d.length > 0 && has3d !== 'none');
        }



        /**
        * Removes the auto scrolling action fired by the mouse wheel and trackpad.
        * After this function is called, the mousewheel and trackpad movements won't scroll through sections.
        */
        function removeMouseWheelHandler(){
            if (document.addEventListener) {
                document.removeEventListener('mousewheel', MouseWheelHandler, false); //IE9, Chrome, Safari, Oper
                document.removeEventListener('wheel', MouseWheelHandler, false); //Firefox
            } else {
                document.detachEvent('onmousewheel', MouseWheelHandler); //IE 6/7/8
            }
        }


        /**
        * Adds the auto scrolling action for the mouse wheel and trackpad.
        * After this function is called, the mousewheel and trackpad movements will scroll through sections
        */
        function addMouseWheelHandler(){
            if (document.addEventListener) {
                document.addEventListener('mousewheel', MouseWheelHandler, false); //IE9, Chrome, Safari, Oper
                document.addEventListener('wheel', MouseWheelHandler, false); //Firefox
            } else {
                document.attachEvent('onmousewheel', MouseWheelHandler); //IE 6/7/8
            }
        }


        /**
        * Adds the possibility to auto scroll through sections on touch devices.
        */
        function addTouchHandler(){
            if(isTouchDevice || isTouch){
                //Microsoft pointers
                var MSPointer = getMSPointer();

                $document.off('touchstart ' +  MSPointer.down).on('touchstart ' + MSPointer.down, touchStartHandler);
                $document.off('touchmove ' + MSPointer.move).on('touchmove ' + MSPointer.move, touchMoveHandler);
            }
        }

        /**
        * Removes the auto scrolling for touch devices.
        */
        function removeTouchHandler(){
            if(isTouchDevice || isTouch){
                //Microsoft pointers
                var MSPointer = getMSPointer();

                $document.off('touchstart ' + MSPointer.down);
                $document.off('touchmove ' + MSPointer.move);
            }
        }


        /*
        * Returns and object with Microsoft pointers (for IE<11 and for IE >= 11)
        * http://msdn.microsoft.com/en-us/library/ie/dn304886(v=vs.85).aspx
        */
        function getMSPointer(){
            var pointer;

            //IE >= 11 & rest of browsers
            if(window.PointerEvent){
                pointer = { down: 'pointerdown', move: 'pointermove'};
            }

            //IE < 11
            else{
                pointer = { down: 'MSPointerDown', move: 'MSPointerMove'};
            }

            return pointer;
        }
        /**
        * Gets the pageX and pageY properties depending on the browser.
        * https://github.com/alvarotrigo/fullPage.js/issues/194#issuecomment-34069854
        */
        function getEventsPage(e){
            var events = [];

            events.y = (typeof e.pageY !== 'undefined' && (e.pageY || e.pageX) ? e.pageY : e.touches[0].pageY);
            events.x = (typeof e.pageX !== 'undefined' && (e.pageY || e.pageX) ? e.pageX : e.touches[0].pageX);

            //in touch devices with scrollBar:true, e.pageY is detected, but we have to deal with touch events. #1008
            if(isTouch && isReallyTouch(e)){
                events.y = e.touches[0].pageY;
                events.x = e.touches[0].pageX;
            }

            return events;
        }

        function silentLandscapeScroll(activeSlide){
            FP.setScrollingSpeed (0, 'internal');
            landscapeScroll(activeSlide.closest(SLIDES_WRAPPER_SEL), activeSlide);
            FP.setScrollingSpeed(originals.scrollingSpeed, 'internal');
        }

        function silentScroll(top){
            if(options.scrollBar){
                container.scrollTop(top);
            }
            else if (options.css3) {
                var translate3d = 'translate3d(0px, -' + top + 'px, 0px)';
                transformContainer(translate3d, false);
            }
            else {
                container.css('top', -top);
            }
        }

        function getTransforms(translate3d){
            return {
                '-webkit-transform': translate3d,
                '-moz-transform': translate3d,
                '-ms-transform':translate3d,
                'transform': translate3d
            };
        }

        function setIsScrollable(value, direction){
            switch (direction){
                case 'up': isScrollAllowed.up = value; break;
                case 'down': isScrollAllowed.down = value; break;
                case 'left': isScrollAllowed.left = value; break;
                case 'right': isScrollAllowed.right = value; break;
                case 'all': FP.setAllowScrolling(value);
            }
        }


        /*
        * Destroys fullpage.js plugin events and optinally its html markup and styles
        */
        FP.destroy = function(all){
            FP.setAutoScrolling(false, 'internal');
            FP.setAllowScrolling(false);
            FP.setKeyboardScrolling(false);
            container.addClass(DESTROYED);

            $window
                .off('scroll', scrollHandler)
                .off('hashchange', hashChangeHandler)
                .off('resize', resizeHandler);

            $document
                .off('click', SECTION_NAV_SEL + ' a')
                .off('mouseenter', SECTION_NAV_SEL + ' li')
                .off('mouseleave', SECTION_NAV_SEL + ' li')
                .off('click', SLIDES_NAV_LINK_SEL)
                .off('mouseover', options.normalScrollElements)
                .off('mouseout', options.normalScrollElements);

            $(SECTION_SEL)
                .off('click', SLIDES_ARROW_SEL);

            //lets make a mess!
            if(all){
                destroyStructure();
            }
        };

        /*
        * Removes inline styles added by fullpage.js
        */
        function destroyStructure(){
            //reseting the `top` or `translate` properties to 0
            silentScroll(0);

            $(SECTION_NAV_SEL + ', ' + SLIDES_NAV_SEL +  ', ' + SLIDES_ARROW_SEL).remove();

            //removing inline styles
            $(SECTION_SEL).css( {
                'height': '',
                'background-color' : '',
                'padding': ''
            });

            $(SLIDE_SEL).css( {
                'width': ''
            });

            container.css({
                'height': '',
                'position': '',
                '-ms-touch-action': '',
                'touch-action': ''
            });

            //removing added classes
            $(SECTION_SEL + ', ' + SLIDE_SEL).each(function(){
                removeSlimScroll($(this));
                $(this).removeClass(TABLE_ACTIVE);
            });

            removeAnimation(container);

            //Unwrapping content
            container.find(TABLE_CELL_SEL + ', ' + SLIDES_CONTAINER_SEL + ', ' + SLIDES_WRAPPER_SEL).each(function(){
                //unwrap not being use in case there's no child element inside and its just text
                $(this).replaceWith(this.childNodes);
            });

            //scrolling the page to the top with no animation
            $htmlBody.scrollTop(0);
        }

        /*
        * Sets the state for a variable with multiple states (original, and temporal)
        * Some variables such as `autoScrolling` or `recordHistory` might change automatically its state when using `responsive` or `autoScrolling:false`.
        * This function is used to keep track of both states, the original and the temporal one.
        * If type is not 'internal', then we assume the user is globally changing the variable.
        */
        function setVariableState(variable, value, type){
            options[variable] = value;
            if(type !== 'internal'){
                originals[variable] = value;
            }
        }

        /**
        * Displays warnings
        */
        function displayWarnings(){
            // Disable mutually exclusive settings
            if (options.continuousVertical &&
                (options.loopTop || options.loopBottom)) {
                options.continuousVertical = false;
                showError('warn', 'Option `loopTop/loopBottom` is mutually exclusive with `continuousVertical`; `continuousVertical` disabled');
            }
            if(options.continuousVertical && options.scrollBar){
                options.continuousVertical = false;
                showError('warn', 'Option `scrollBar` is mutually exclusive with `continuousVertical`; `continuousVertical` disabled');
            }

            //anchors can not have the same value as any element ID or NAME
            $.each(options.anchors, function(index, name){
                if($('#' + name).length || $('[name="'+name+'"]').length ){
                    showError('error', 'data-anchor tags can not have the same value as any `id` element on the site (or `name` element for IE).');
                }
            });
        }

        function showError(type, text){
            console && console[type] && console[type]('fullPage: ' + text);
        }
    };
})(jQuery, window, document, Math);