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jquery.fullPage.js
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/**
* fullPage 2.6.0
* 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';
// 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: [],
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(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.getElementsByClassName(SECTION)[0].offsetTop);
//taking the section which is showing more content in the viewport
var sections = document.getElementsByClassName(SECTION);
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;
if(canScroll){
var averageEnd = getAverage(scrollings, 10);
var averageMiddle = getAverage(scrollings, 70);
var isAccelerating = averageEnd >= averageMiddle;
var isKineticScrolling = timeDiff <= 30;
// if its kinetic scrolling, we make sure its accelering (to avoid double swipes)
if((isAccelerating && isKineticScrolling) || !isKineticScrolling){
//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));
});
}