app/assets/javascripts/jquery.bxslider.js
/**
* BxSlider v4.1.1 - Fully loaded, responsive content slider
* http://bxslider.com
*
* Copyright 2013, Steven Wanderski - http://stevenwanderski.com - http://bxcreative.com
* Written while drinking Belgian ales and listening to jazz
*
* Released under the MIT license - http://opensource.org/licenses/MIT
*/
;(function($){
var plugin = {};
var defaults = {
// GENERAL
mode: 'horizontal',
slideSelector: '',
infiniteLoop: true,
hideControlOnEnd: false,
speed: 500,
easing: null,
slideMargin: 0,
startSlide: 0,
randomStart: false,
captions: false,
ticker: false,
tickerHover: false,
adaptiveHeight: false,
adaptiveHeightSpeed: 500,
video: false,
useCSS: true,
preloadImages: 'visible',
responsive: true,
// TOUCH
touchEnabled: true,
swipeThreshold: 50,
oneToOneTouch: true,
preventDefaultSwipeX: true,
preventDefaultSwipeY: false,
// PAGER
pager: true,
pagerType: 'full',
pagerShortSeparator: ' / ',
pagerSelector: null,
buildPager: null,
pagerCustom: null,
// CONTROLS
controls: true,
nextText: 'Next',
prevText: 'Prev',
nextSelector: null,
prevSelector: null,
autoControls: false,
startText: 'Start',
stopText: 'Stop',
autoControlsCombine: false,
autoControlsSelector: null,
// AUTO
auto: false,
pause: 4000,
autoStart: true,
autoDirection: 'next',
autoHover: false,
autoDelay: 0,
// CAROUSEL
minSlides: 1,
maxSlides: 1,
moveSlides: 0,
slideWidth: 0,
// CALLBACKS
onSliderLoad: function() {},
onSlideBefore: function() {},
onSlideAfter: function() {},
onSlideNext: function() {},
onSlidePrev: function() {}
}
$.fn.bxSlider = function(options){
if(this.length == 0) return this;
// support mutltiple elements
if(this.length > 1){
this.each(function(){$(this).bxSlider(options)});
return this;
}
// create a namespace to be used throughout the plugin
var slider = {};
// set a reference to our slider element
var el = this;
plugin.el = this;
/**
* Makes slideshow responsive
*/
// first get the original window dimens (thanks alot IE)
var windowWidth = $(window).width();
var windowHeight = $(window).height();
/**
* ===================================================================================
* = PRIVATE FUNCTIONS
* ===================================================================================
*/
/**
* Initializes namespace settings to be used throughout plugin
*/
var init = function(){
// merge user-supplied options with the defaults
slider.settings = $.extend({}, defaults, options);
// parse slideWidth setting
slider.settings.slideWidth = parseInt(slider.settings.slideWidth);
// store the original children
slider.children = el.children(slider.settings.slideSelector);
// check if actual number of slides is less than minSlides / maxSlides
if(slider.children.length < slider.settings.minSlides) slider.settings.minSlides = slider.children.length;
if(slider.children.length < slider.settings.maxSlides) slider.settings.maxSlides = slider.children.length;
// if random start, set the startSlide setting to random number
if(slider.settings.randomStart) slider.settings.startSlide = Math.floor(Math.random() * slider.children.length);
// store active slide information
slider.active = { index: slider.settings.startSlide }
// store if the slider is in carousel mode (displaying / moving multiple slides)
slider.carousel = slider.settings.minSlides > 1 || slider.settings.maxSlides > 1;
// if carousel, force preloadImages = 'all'
if(slider.carousel) slider.settings.preloadImages = 'all';
// calculate the min / max width thresholds based on min / max number of slides
// used to setup and update carousel slides dimensions
slider.minThreshold = (slider.settings.minSlides * slider.settings.slideWidth) + ((slider.settings.minSlides - 1) * slider.settings.slideMargin);
slider.maxThreshold = (slider.settings.maxSlides * slider.settings.slideWidth) + ((slider.settings.maxSlides - 1) * slider.settings.slideMargin);
// store the current state of the slider (if currently animating, working is true)
slider.working = false;
// initialize the controls object
slider.controls = {};
// initialize an auto interval
slider.interval = null;
// determine which property to use for transitions
slider.animProp = slider.settings.mode == 'vertical' ? 'top' : 'left';
// determine if hardware acceleration can be used
slider.usingCSS = slider.settings.useCSS && slider.settings.mode != 'fade' && (function(){
// create our test div element
var div = document.createElement('div');
// css transition properties
var props = ['WebkitPerspective', 'MozPerspective', 'OPerspective', 'msPerspective'];
// test for each property
for(var i in props){
if(div.style[props[i]] !== undefined){
slider.cssPrefix = props[i].replace('Perspective', '').toLowerCase();
slider.animProp = '-' + slider.cssPrefix + '-transform';
return true;
}
}
return false;
}());
// if vertical mode always make maxSlides and minSlides equal
if(slider.settings.mode == 'vertical') slider.settings.maxSlides = slider.settings.minSlides;
// save original style data
el.data("origStyle", el.attr("style"));
el.children(slider.settings.slideSelector).each(function() {
$(this).data("origStyle", $(this).attr("style"));
});
// perform all DOM / CSS modifications
setup();
}
/**
* Performs all DOM and CSS modifications
*/
var setup = function(){
// wrap el in a wrapper
el.wrap('<div class="bx-wrapper"><div class="bx-viewport"></div></div>');
// store a namspace reference to .bx-viewport
slider.viewport = el.parent();
// add a loading div to display while images are loading
slider.loader = $('<div class="bx-loading" />');
slider.viewport.prepend(slider.loader);
// set el to a massive width, to hold any needed slides
// also strip any margin and padding from el
el.css({
width: slider.settings.mode == 'horizontal' ? (slider.children.length * 100 + 215) + '%' : 'auto',
position: 'relative'
});
// if using CSS, add the easing property
if(slider.usingCSS && slider.settings.easing){
el.css('-' + slider.cssPrefix + '-transition-timing-function', slider.settings.easing);
// if not using CSS and no easing value was supplied, use the default JS animation easing (swing)
}else if(!slider.settings.easing){
slider.settings.easing = 'swing';
}
var slidesShowing = getNumberSlidesShowing();
// make modifications to the viewport (.bx-viewport)
slider.viewport.css({
width: '100%',
overflow: 'hidden',
position: 'relative'
});
slider.viewport.parent().css({
maxWidth: getViewportMaxWidth()
});
// make modification to the wrapper (.bx-wrapper)
if(!slider.settings.pager) {
slider.viewport.parent().css({
margin: '0 auto 0px'
});
}
// apply css to all slider children
slider.children.css({
'float': slider.settings.mode == 'horizontal' ? 'left' : 'none',
listStyle: 'none',
position: 'relative'
});
// apply the calculated width after the float is applied to prevent scrollbar interference
slider.children.css('width', getSlideWidth());
// if slideMargin is supplied, add the css
if(slider.settings.mode == 'horizontal' && slider.settings.slideMargin > 0) slider.children.css('marginRight', slider.settings.slideMargin);
if(slider.settings.mode == 'vertical' && slider.settings.slideMargin > 0) slider.children.css('marginBottom', slider.settings.slideMargin);
// if "fade" mode, add positioning and z-index CSS
if(slider.settings.mode == 'fade'){
slider.children.css({
position: 'absolute',
zIndex: 0,
display: 'none'
});
// prepare the z-index on the showing element
slider.children.eq(slider.settings.startSlide).css({zIndex: 50, display: 'block'});
}
// create an element to contain all slider controls (pager, start / stop, etc)
slider.controls.el = $('<div class="bx-controls" />');
// if captions are requested, add them
if(slider.settings.captions) appendCaptions();
// check if startSlide is last slide
slider.active.last = slider.settings.startSlide == getPagerQty() - 1;
// if video is true, set up the fitVids plugin
if(slider.settings.video) el.fitVids();
// set the default preload selector (visible)
var preloadSelector = slider.children.eq(slider.settings.startSlide);
if (slider.settings.preloadImages == "all") preloadSelector = slider.children;
// only check for control addition if not in "ticker" mode
if(!slider.settings.ticker){
// if pager is requested, add it
if(slider.settings.pager) appendPager();
// if controls are requested, add them
if(slider.settings.controls) appendControls();
// if auto is true, and auto controls are requested, add them
if(slider.settings.auto && slider.settings.autoControls) appendControlsAuto();
// if any control option is requested, add the controls wrapper
if(slider.settings.controls || slider.settings.autoControls || slider.settings.pager) slider.viewport.after(slider.controls.el);
// if ticker mode, do not allow a pager
}else{
slider.settings.pager = false;
}
// preload all images, then perform final DOM / CSS modifications that depend on images being loaded
loadElements(preloadSelector, start);
}
var loadElements = function(selector, callback){
var total = selector.find('img, iframe').length;
if (total == 0){
callback();
return;
}
var count = 0;
selector.find('img, iframe').each(function(){
$(this).one('load', function() {
if(++count == total) callback();
}).each(function() {
if(this.complete) $(this).load();
});
});
}
/**
* Start the slider
*/
var start = function(){
// if infinite loop, prepare additional slides
if(slider.settings.infiniteLoop && slider.settings.mode != 'fade' && !slider.settings.ticker){
var slice = slider.settings.mode == 'vertical' ? slider.settings.minSlides : slider.settings.maxSlides;
var sliceAppend = slider.children.slice(0, slice).clone().addClass('bx-clone');
var slicePrepend = slider.children.slice(-slice).clone().addClass('bx-clone');
el.append(sliceAppend).prepend(slicePrepend);
}
// remove the loading DOM element
slider.loader.remove();
// set the left / top position of "el"
setSlidePosition();
// if "vertical" mode, always use adaptiveHeight to prevent odd behavior
if (slider.settings.mode == 'vertical') slider.settings.adaptiveHeight = true;
// set the viewport height
slider.viewport.height(getViewportHeight());
// make sure everything is positioned just right (same as a window resize)
el.redrawSlider();
// onSliderLoad callback
slider.settings.onSliderLoad(slider.active.index);
// slider has been fully initialized
slider.initialized = true;
// bind the resize call to the window
if (slider.settings.responsive) $(window).bind('resize', resizeWindow);
// if auto is true, start the show
if (slider.settings.auto && slider.settings.autoStart) initAuto();
// if ticker is true, start the ticker
if (slider.settings.ticker) initTicker();
// if pager is requested, make the appropriate pager link active
if (slider.settings.pager) updatePagerActive(slider.settings.startSlide);
// check for any updates to the controls (like hideControlOnEnd updates)
if (slider.settings.controls) updateDirectionControls();
// if touchEnabled is true, setup the touch events
if (slider.settings.touchEnabled && !slider.settings.ticker) initTouch();
}
/**
* Returns the calculated height of the viewport, used to determine either adaptiveHeight or the maxHeight value
*/
var getViewportHeight = function(){
var height = 0;
// first determine which children (slides) should be used in our height calculation
var children = $();
// if mode is not "vertical" and adaptiveHeight is false, include all children
if(slider.settings.mode != 'vertical' && !slider.settings.adaptiveHeight){
children = slider.children;
}else{
// if not carousel, return the single active child
if(!slider.carousel){
children = slider.children.eq(slider.active.index);
// if carousel, return a slice of children
}else{
// get the individual slide index
var currentIndex = slider.settings.moveSlides == 1 ? slider.active.index : slider.active.index * getMoveBy();
// add the current slide to the children
children = slider.children.eq(currentIndex);
// cycle through the remaining "showing" slides
for (i = 1; i <= slider.settings.maxSlides - 1; i++){
// if looped back to the start
if(currentIndex + i >= slider.children.length){
children = children.add(slider.children.eq(i - 1));
}else{
children = children.add(slider.children.eq(currentIndex + i));
}
}
}
}
// if "vertical" mode, calculate the sum of the heights of the children
if(slider.settings.mode == 'vertical'){
children.each(function(index) {
height += $(this).outerHeight();
});
// add user-supplied margins
if(slider.settings.slideMargin > 0){
height += slider.settings.slideMargin * (slider.settings.minSlides - 1);
}
// if not "vertical" mode, calculate the max height of the children
}else{
height = Math.max.apply(Math, children.map(function(){
return $(this).outerHeight(false);
}).get());
}
return height;
}
/**
* Returns the calculated width to be used for the outer wrapper / viewport
*/
var getViewportMaxWidth = function(){
var width = '100%';
if(slider.settings.slideWidth > 0){
if(slider.settings.mode == 'horizontal'){
width = (slider.settings.maxSlides * slider.settings.slideWidth) + ((slider.settings.maxSlides - 1) * slider.settings.slideMargin);
}else{
width = slider.settings.slideWidth;
}
}
return width;
}
/**
* Returns the calculated width to be applied to each slide
*/
var getSlideWidth = function(){
// start with any user-supplied slide width
var newElWidth = slider.settings.slideWidth;
// get the current viewport width
var wrapWidth = slider.viewport.width();
// if slide width was not supplied, or is larger than the viewport use the viewport width
if(slider.settings.slideWidth == 0 ||
(slider.settings.slideWidth > wrapWidth && !slider.carousel) ||
slider.settings.mode == 'vertical'){
newElWidth = wrapWidth;
// if carousel, use the thresholds to determine the width
}else if(slider.settings.maxSlides > 1 && slider.settings.mode == 'horizontal'){
if(wrapWidth > slider.maxThreshold){
// newElWidth = (wrapWidth - (slider.settings.slideMargin * (slider.settings.maxSlides - 1))) / slider.settings.maxSlides;
}else if(wrapWidth < slider.minThreshold){
newElWidth = (wrapWidth - (slider.settings.slideMargin * (slider.settings.minSlides - 1))) / slider.settings.minSlides;
}
}
return newElWidth;
}
/**
* Returns the number of slides currently visible in the viewport (includes partially visible slides)
*/
var getNumberSlidesShowing = function(){
var slidesShowing = 1;
if(slider.settings.mode == 'horizontal' && slider.settings.slideWidth > 0){
// if viewport is smaller than minThreshold, return minSlides
if(slider.viewport.width() < slider.minThreshold){
slidesShowing = slider.settings.minSlides;
// if viewport is larger than minThreshold, return maxSlides
}else if(slider.viewport.width() > slider.maxThreshold){
slidesShowing = slider.settings.maxSlides;
// if viewport is between min / max thresholds, divide viewport width by first child width
}else{
var childWidth = slider.children.first().width();
slidesShowing = Math.floor(slider.viewport.width() / childWidth);
}
// if "vertical" mode, slides showing will always be minSlides
}else if(slider.settings.mode == 'vertical'){
slidesShowing = slider.settings.minSlides;
}
return slidesShowing;
}
/**
* Returns the number of pages (one full viewport of slides is one "page")
*/
var getPagerQty = function(){
var pagerQty = 0;
// if moveSlides is specified by the user
if(slider.settings.moveSlides > 0){
if(slider.settings.infiniteLoop){
pagerQty = slider.children.length / getMoveBy();
}else{
// use a while loop to determine pages
var breakPoint = 0;
var counter = 0
// when breakpoint goes above children length, counter is the number of pages
while (breakPoint < slider.children.length){
++pagerQty;
breakPoint = counter + getNumberSlidesShowing();
counter += slider.settings.moveSlides <= getNumberSlidesShowing() ? slider.settings.moveSlides : getNumberSlidesShowing();
}
}
// if moveSlides is 0 (auto) divide children length by sides showing, then round up
}else{
pagerQty = Math.ceil(slider.children.length / getNumberSlidesShowing());
}
return pagerQty;
}
/**
* Returns the number of indivual slides by which to shift the slider
*/
var getMoveBy = function(){
// if moveSlides was set by the user and moveSlides is less than number of slides showing
if(slider.settings.moveSlides > 0 && slider.settings.moveSlides <= getNumberSlidesShowing()){
return slider.settings.moveSlides;
}
// if moveSlides is 0 (auto)
return getNumberSlidesShowing();
}
/**
* Sets the slider's (el) left or top position
*/
var setSlidePosition = function(){
// if last slide, not infinite loop, and number of children is larger than specified maxSlides
if(slider.children.length > slider.settings.maxSlides && slider.active.last && !slider.settings.infiniteLoop){
if (slider.settings.mode == 'horizontal'){
// get the last child's position
var lastChild = slider.children.last();
var position = lastChild.position();
// set the left position
setPositionProperty(-(position.left - (slider.viewport.width() - lastChild.width())), 'reset', 0);
}else if(slider.settings.mode == 'vertical'){
// get the last showing index's position
var lastShowingIndex = slider.children.length - slider.settings.minSlides;
var position = slider.children.eq(lastShowingIndex).position();
// set the top position
setPositionProperty(-position.top, 'reset', 0);
}
// if not last slide
}else{
// get the position of the first showing slide
var position = slider.children.eq(slider.active.index * getMoveBy()).position();
// check for last slide
if (slider.active.index == getPagerQty() - 1) slider.active.last = true;
// set the repective position
if (position != undefined){
if (slider.settings.mode == 'horizontal') setPositionProperty(-position.left, 'reset', 0);
else if (slider.settings.mode == 'vertical') setPositionProperty(-position.top, 'reset', 0);
}
}
}
/**
* Sets the el's animating property position (which in turn will sometimes animate el).
* If using CSS, sets the transform property. If not using CSS, sets the top / left property.
*
* @param value (int)
* - the animating property's value
*
* @param type (string) 'slider', 'reset', 'ticker'
* - the type of instance for which the function is being
*
* @param duration (int)
* - the amount of time (in ms) the transition should occupy
*
* @param params (array) optional
* - an optional parameter containing any variables that need to be passed in
*/
var setPositionProperty = function(value, type, duration, params){
// use CSS transform
if(slider.usingCSS){
// determine the translate3d value
var propValue = slider.settings.mode == 'vertical' ? 'translate3d(0, ' + value + 'px, 0)' : 'translate3d(' + value + 'px, 0, 0)';
// add the CSS transition-duration
el.css('-' + slider.cssPrefix + '-transition-duration', duration / 1000 + 's');
if(type == 'slide'){
// set the property value
el.css(slider.animProp, propValue);
// bind a callback method - executes when CSS transition completes
el.bind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd', function(){
// unbind the callback
el.unbind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd');
updateAfterSlideTransition();
});
}else if(type == 'reset'){
el.css(slider.animProp, propValue);
}else if(type == 'ticker'){
// make the transition use 'linear'
el.css('-' + slider.cssPrefix + '-transition-timing-function', 'linear');
el.css(slider.animProp, propValue);
// bind a callback method - executes when CSS transition completes
el.bind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd', function(){
// unbind the callback
el.unbind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd');
// reset the position
setPositionProperty(params['resetValue'], 'reset', 0);
// start the loop again
tickerLoop();
});
}
// use JS animate
}else{
var animateObj = {};
animateObj[slider.animProp] = value;
if(type == 'slide'){
el.animate(animateObj, duration, slider.settings.easing, function(){
updateAfterSlideTransition();
});
}else if(type == 'reset'){
el.css(slider.animProp, value)
}else if(type == 'ticker'){
el.animate(animateObj, speed, 'linear', function(){
setPositionProperty(params['resetValue'], 'reset', 0);
// run the recursive loop after animation
tickerLoop();
});
}
}
}
/**
* Populates the pager with proper amount of pages
*/
var populatePager = function(){
var pagerHtml = '';
var pagerQty = getPagerQty();
// loop through each pager item
for(var i=0; i < pagerQty; i++){
var linkContent = '';
// if a buildPager function is supplied, use it to get pager link value, else use index + 1
if(slider.settings.buildPager && $.isFunction(slider.settings.buildPager)){
linkContent = slider.settings.buildPager(i);
slider.pagerEl.addClass('bx-custom-pager');
}else{
linkContent = i + 1;
slider.pagerEl.addClass('bx-default-pager');
}
// var linkContent = slider.settings.buildPager && $.isFunction(slider.settings.buildPager) ? slider.settings.buildPager(i) : i + 1;
// add the markup to the string
pagerHtml += '<div class="bx-pager-item"><a href="" data-slide-index="' + i + '" class="bx-pager-link">' + linkContent + '</a></div>';
};
// populate the pager element with pager links
slider.pagerEl.html(pagerHtml);
}
/**
* Appends the pager to the controls element
*/
var appendPager = function(){
if(!slider.settings.pagerCustom){
// create the pager DOM element
slider.pagerEl = $('<div class="bx-pager" />');
// if a pager selector was supplied, populate it with the pager
if(slider.settings.pagerSelector){
$(slider.settings.pagerSelector).html(slider.pagerEl);
// if no pager selector was supplied, add it after the wrapper
}else{
slider.controls.el.addClass('bx-has-pager').append(slider.pagerEl);
}
// populate the pager
populatePager();
}else{
slider.pagerEl = $(slider.settings.pagerCustom);
}
// assign the pager click binding
slider.pagerEl.delegate('a', 'click', clickPagerBind);
}
/**
* Appends prev / next controls to the controls element
*/
var appendControls = function(){
slider.controls.next = $('<a class="bx-next" href="">' + slider.settings.nextText + '</a>');
slider.controls.prev = $('<a class="bx-prev" href="">' + slider.settings.prevText + '</a>');
// bind click actions to the controls
slider.controls.next.bind('click', clickNextBind);
slider.controls.prev.bind('click', clickPrevBind);
// if nextSlector was supplied, populate it
if(slider.settings.nextSelector){
$(slider.settings.nextSelector).append(slider.controls.next);
}
// if prevSlector was supplied, populate it
if(slider.settings.prevSelector){
$(slider.settings.prevSelector).append(slider.controls.prev);
}
// if no custom selectors were supplied
if(!slider.settings.nextSelector && !slider.settings.prevSelector){
// add the controls to the DOM
slider.controls.directionEl = $('<div class="bx-controls-direction" />');
// add the control elements to the directionEl
slider.controls.directionEl.append(slider.controls.prev).append(slider.controls.next);
// slider.viewport.append(slider.controls.directionEl);
slider.controls.el.addClass('bx-has-controls-direction').append(slider.controls.directionEl);
}
}
/**
* Appends start / stop auto controls to the controls element
*/
var appendControlsAuto = function(){
slider.controls.start = $('<div class="bx-controls-auto-item"><a class="bx-start" href="">' + slider.settings.startText + '</a></div>');
slider.controls.stop = $('<div class="bx-controls-auto-item"><a class="bx-stop" href="">' + slider.settings.stopText + '</a></div>');
// add the controls to the DOM
slider.controls.autoEl = $('<div class="bx-controls-auto" />');
// bind click actions to the controls
slider.controls.autoEl.delegate('.bx-start', 'click', clickStartBind);
slider.controls.autoEl.delegate('.bx-stop', 'click', clickStopBind);
// if autoControlsCombine, insert only the "start" control
if(slider.settings.autoControlsCombine){
slider.controls.autoEl.append(slider.controls.start);
// if autoControlsCombine is false, insert both controls
}else{
slider.controls.autoEl.append(slider.controls.start).append(slider.controls.stop);
}
// if auto controls selector was supplied, populate it with the controls
if(slider.settings.autoControlsSelector){
$(slider.settings.autoControlsSelector).html(slider.controls.autoEl);
// if auto controls selector was not supplied, add it after the wrapper
}else{
slider.controls.el.addClass('bx-has-controls-auto').append(slider.controls.autoEl);
}
// update the auto controls
updateAutoControls(slider.settings.autoStart ? 'stop' : 'start');
}
/**
* Appends image captions to the DOM
*/
var appendCaptions = function(){
// cycle through each child
slider.children.each(function(index){
// get the image title attribute
var title = $(this).find('img:first').attr('title');
// append the caption
if (title != undefined && ('' + title).length) {
$(this).append('<div class="bx-caption"><span>' + title + '</span></div>');
}
});
}
/**
* Click next binding
*
* @param e (event)
* - DOM event object
*/
var clickNextBind = function(e){
// if auto show is running, stop it
if (slider.settings.auto) el.stopAuto();
el.goToNextSlide();
e.preventDefault();
}
/**
* Click prev binding
*
* @param e (event)
* - DOM event object
*/
var clickPrevBind = function(e){
// if auto show is running, stop it
if (slider.settings.auto) el.stopAuto();
el.goToPrevSlide();
e.preventDefault();
}
/**
* Click start binding
*
* @param e (event)
* - DOM event object
*/
var clickStartBind = function(e){
el.startAuto();
e.preventDefault();
}
/**
* Click stop binding
*
* @param e (event)
* - DOM event object
*/
var clickStopBind = function(e){
el.stopAuto();
e.preventDefault();
}
/**
* Click pager binding
*
* @param e (event)
* - DOM event object
*/
var clickPagerBind = function(e){
// if auto show is running, stop it
if (slider.settings.auto) el.stopAuto();
var pagerLink = $(e.currentTarget);
var pagerIndex = parseInt(pagerLink.attr('data-slide-index'));
// if clicked pager link is not active, continue with the goToSlide call
if(pagerIndex != slider.active.index) el.goToSlide(pagerIndex);
e.preventDefault();
}
/**
* Updates the pager links with an active class
*
* @param slideIndex (int)
* - index of slide to make active
*/
var updatePagerActive = function(slideIndex){
// if "short" pager type
var len = slider.children.length; // nb of children
if(slider.settings.pagerType == 'short'){
if(slider.settings.maxSlides > 1) {
len = Math.ceil(slider.children.length/slider.settings.maxSlides);
}
slider.pagerEl.html( (slideIndex + 1) + slider.settings.pagerShortSeparator + len);
return;
}
// remove all pager active classes
slider.pagerEl.find('a').removeClass('active');
// apply the active class for all pagers
slider.pagerEl.each(function(i, el) { $(el).find('a').eq(slideIndex).addClass('active'); });
}
/**
* Performs needed actions after a slide transition
*/
var updateAfterSlideTransition = function(){
// if infinte loop is true
if(slider.settings.infiniteLoop){
var position = '';
// first slide
if(slider.active.index == 0){
// set the new position
position = slider.children.eq(0).position();
// carousel, last slide
}else if(slider.active.index == getPagerQty() - 1 && slider.carousel){
position = slider.children.eq((getPagerQty() - 1) * getMoveBy()).position();
// last slide
}else if(slider.active.index == slider.children.length - 1){
position = slider.children.eq(slider.children.length - 1).position();
}
if (slider.settings.mode == 'horizontal') { setPositionProperty(-position.left, 'reset', 0);; }
else if (slider.settings.mode == 'vertical') { setPositionProperty(-position.top, 'reset', 0);; }
}
// declare that the transition is complete
slider.working = false;
// onSlideAfter callback
slider.settings.onSlideAfter(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index);
}
/**
* Updates the auto controls state (either active, or combined switch)
*
* @param state (string) "start", "stop"
* - the new state of the auto show
*/
var updateAutoControls = function(state){
// if autoControlsCombine is true, replace the current control with the new state
if(slider.settings.autoControlsCombine){
slider.controls.autoEl.html(slider.controls[state]);
// if autoControlsCombine is false, apply the "active" class to the appropriate control
}else{
slider.controls.autoEl.find('a').removeClass('active');
slider.controls.autoEl.find('a:not(.bx-' + state + ')').addClass('active');
}
}
/**
* Updates the direction controls (checks if either should be hidden)
*/
var updateDirectionControls = function(){
if(getPagerQty() == 1){
slider.controls.prev.addClass('disabled');
slider.controls.next.addClass('disabled');
}else if(!slider.settings.infiniteLoop && slider.settings.hideControlOnEnd){
// if first slide
if (slider.active.index == 0){
slider.controls.prev.addClass('disabled');
slider.controls.next.removeClass('disabled');
// if last slide
}else if(slider.active.index == getPagerQty() - 1){
slider.controls.next.addClass('disabled');
slider.controls.prev.removeClass('disabled');
// if any slide in the middle
}else{
slider.controls.prev.removeClass('disabled');
slider.controls.next.removeClass('disabled');
}
}
}
/**
* Initialzes the auto process
*/
var initAuto = function(){
// if autoDelay was supplied, launch the auto show using a setTimeout() call
if(slider.settings.autoDelay > 0){
var timeout = setTimeout(el.startAuto, slider.settings.autoDelay);
// if autoDelay was not supplied, start the auto show normally
}else{
el.startAuto();
}
// if autoHover is requested
if(slider.settings.autoHover){
// on el hover
el.hover(function(){
// if the auto show is currently playing (has an active interval)
if(slider.interval){
// stop the auto show and pass true agument which will prevent control update
el.stopAuto(true);
// create a new autoPaused value which will be used by the relative "mouseout" event
slider.autoPaused = true;
}
}, function(){
// if the autoPaused value was created be the prior "mouseover" event
if(slider.autoPaused){
// start the auto show and pass true agument which will prevent control update
el.startAuto(true);
// reset the autoPaused value
slider.autoPaused = null;
}
});
}
}
/**
* Initialzes the ticker process
*/
var initTicker = function(){
var startPosition = 0;
// if autoDirection is "next", append a clone of the entire slider
if(slider.settings.autoDirection == 'next'){
el.append(slider.children.clone().addClass('bx-clone'));
// if autoDirection is "prev", prepend a clone of the entire slider, and set the left position
}else{
el.prepend(slider.children.clone().addClass('bx-clone'));
var position = slider.children.first().position();
startPosition = slider.settings.mode == 'horizontal' ? -position.left : -position.top;
}
setPositionProperty(startPosition, 'reset', 0);
// do not allow controls in ticker mode
slider.settings.pager = false;
slider.settings.controls = false;
slider.settings.autoControls = false;
// if autoHover is requested
if(slider.settings.tickerHover && !slider.usingCSS){
// on el hover
slider.viewport.hover(function(){
el.stop();
}, function(){
// calculate the total width of children (used to calculate the speed ratio)
var totalDimens = 0;
slider.children.each(function(index){
totalDimens += slider.settings.mode == 'horizontal' ? $(this).outerWidth(true) : $(this).outerHeight(true);
});
// calculate the speed ratio (used to determine the new speed to finish the paused animation)
var ratio = slider.settings.speed / totalDimens;
// determine which property to use
var property = slider.settings.mode == 'horizontal' ? 'left' : 'top';
// calculate the new speed
var newSpeed = ratio * (totalDimens - (Math.abs(parseInt(el.css(property)))));
tickerLoop(newSpeed);
});
}
// start the ticker loop
tickerLoop();
}
/**
* Runs a continuous loop, news ticker-style
*/
var tickerLoop = function(resumeSpeed){
speed = resumeSpeed ? resumeSpeed : slider.settings.speed;
var position = {left: 0, top: 0};
var reset = {left: 0, top: 0};
// if "next" animate left position to last child, then reset left to 0
if(slider.settings.autoDirection == 'next'){
position = el.find('.bx-clone').first().position();
// if "prev" animate left position to 0, then reset left to first non-clone child
}else{
reset = slider.children.first().position();
}
var animateProperty = slider.settings.mode == 'horizontal' ? -position.left : -position.top;
var resetValue = slider.settings.mode == 'horizontal' ? -reset.left : -reset.top;
var params = {resetValue: resetValue};
setPositionProperty(animateProperty, 'ticker', speed, params);
}
/**
* Initializes touch events
*/
var initTouch = function(){
// initialize object to contain all touch values
slider.touch = {
start: {x: 0, y: 0},
end: {x: 0, y: 0}
}
slider.viewport.bind('touchstart', onTouchStart);
}
/**
* Event handler for "touchstart"
*
* @param e (event)
* - DOM event object
*/
var onTouchStart = function(e){
if(slider.working){
e.preventDefault();
}else{
// record the original position when touch starts
slider.touch.originalPos = el.position();
var orig = e.originalEvent;
// record the starting touch x, y coordinates
slider.touch.start.x = orig.changedTouches[0].pageX;
slider.touch.start.y = orig.changedTouches[0].pageY;
// bind a "touchmove" event to the viewport
slider.viewport.bind('touchmove', onTouchMove);
// bind a "touchend" event to the viewport
slider.viewport.bind('touchend', onTouchEnd);
}
}
/**
* Event handler for "touchmove"
*
* @param e (event)
* - DOM event object
*/
var onTouchMove = function(e){
var orig = e.originalEvent;
// if scrolling on y axis, do not prevent default
var xMovement = Math.abs(orig.changedTouches[0].pageX - slider.touch.start.x);
var yMovement = Math.abs(orig.changedTouches[0].pageY - slider.touch.start.y);
// x axis swipe
if((xMovement * 3) > yMovement && slider.settings.preventDefaultSwipeX){
e.preventDefault();
// y axis swipe
}else if((yMovement * 3) > xMovement && slider.settings.preventDefaultSwipeY){
e.preventDefault();
}
if(slider.settings.mode != 'fade' && slider.settings.oneToOneTouch){
var value = 0;
// if horizontal, drag along x axis
if(slider.settings.mode == 'horizontal'){
var change = orig.changedTouches[0].pageX - slider.touch.start.x;
value = slider.touch.originalPos.left + change;
// if vertical, drag along y axis
}else{
var change = orig.changedTouches[0].pageY - slider.touch.start.y;
value = slider.touch.originalPos.top + change;
}
setPositionProperty(value, 'reset', 0);
}
}
/**
* Event handler for "touchend"
*
* @param e (event)
* - DOM event object
*/
var onTouchEnd = function(e){
slider.viewport.unbind('touchmove', onTouchMove);
var orig = e.originalEvent;
var value = 0;
// record end x, y positions
slider.touch.end.x = orig.changedTouches[0].pageX;
slider.touch.end.y = orig.changedTouches[0].pageY;
// if fade mode, check if absolute x distance clears the threshold
if(slider.settings.mode == 'fade'){
var distance = Math.abs(slider.touch.start.x - slider.touch.end.x);
if(distance >= slider.settings.swipeThreshold){
slider.touch.start.x > slider.touch.end.x ? el.goToNextSlide() : el.goToPrevSlide();
el.stopAuto();
}
// not fade mode
}else{
var distance = 0;
// calculate distance and el's animate property
if(slider.settings.mode == 'horizontal'){
distance = slider.touch.end.x - slider.touch.start.x;
value = slider.touch.originalPos.left;
}else{
distance = slider.touch.end.y - slider.touch.start.y;
value = slider.touch.originalPos.top;
}
// if not infinite loop and first / last slide, do not attempt a slide transition
if(!slider.settings.infiniteLoop && ((slider.active.index == 0 && distance > 0) || (slider.active.last && distance < 0))){
setPositionProperty(value, 'reset', 200);
}else{
// check if distance clears threshold
if(Math.abs(distance) >= slider.settings.swipeThreshold){
distance < 0 ? el.goToNextSlide() : el.goToPrevSlide();
el.stopAuto();
}else{
// el.animate(property, 200);
setPositionProperty(value, 'reset', 200);
}
}
}
slider.viewport.unbind('touchend', onTouchEnd);
}
/**
* Window resize event callback
*/
var resizeWindow = function(e){
// get the new window dimens (again, thank you IE)
var windowWidthNew = $(window).width();
var windowHeightNew = $(window).height();
// make sure that it is a true window resize
// *we must check this because our dinosaur friend IE fires a window resize event when certain DOM elements
// are resized. Can you just die already?*
if(windowWidth != windowWidthNew || windowHeight != windowHeightNew){
// set the new window dimens
windowWidth = windowWidthNew;
windowHeight = windowHeightNew;
// update all dynamic elements
el.redrawSlider();
}
}
/**
* ===================================================================================
* = PUBLIC FUNCTIONS
* ===================================================================================
*/
/**
* Performs slide transition to the specified slide
*
* @param slideIndex (int)
* - the destination slide's index (zero-based)
*
* @param direction (string)
* - INTERNAL USE ONLY - the direction of travel ("prev" / "next")
*/
el.goToSlide = function(slideIndex, direction){
// if plugin is currently in motion, ignore request
if(slider.working || slider.active.index == slideIndex) return;
// declare that plugin is in motion
slider.working = true;
// store the old index
slider.oldIndex = slider.active.index;
// if slideIndex is less than zero, set active index to last child (this happens during infinite loop)
if(slideIndex < 0){
slider.active.index = getPagerQty() - 1;
// if slideIndex is greater than children length, set active index to 0 (this happens during infinite loop)
}else if(slideIndex >= getPagerQty()){
slider.active.index = 0;
// set active index to requested slide
}else{
slider.active.index = slideIndex;
}
// onSlideBefore, onSlideNext, onSlidePrev callbacks
slider.settings.onSlideBefore(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index);
if(direction == 'next'){
slider.settings.onSlideNext(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index);
}else if(direction == 'prev'){
slider.settings.onSlidePrev(slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index);
}
// check if last slide
slider.active.last = slider.active.index >= getPagerQty() - 1;
// update the pager with active class
if(slider.settings.pager) updatePagerActive(slider.active.index);
// // check for direction control update
if(slider.settings.controls) updateDirectionControls();
// if slider is set to mode: "fade"
if(slider.settings.mode == 'fade'){
// if adaptiveHeight is true and next height is different from current height, animate to the new height
if(slider.settings.adaptiveHeight && slider.viewport.height() != getViewportHeight()){
slider.viewport.animate({height: getViewportHeight()}, slider.settings.adaptiveHeightSpeed);
}
// fade out the visible child and reset its z-index value
slider.children.filter(':visible').fadeOut(slider.settings.speed).css({zIndex: 0});
// fade in the newly requested slide
slider.children.eq(slider.active.index).css('zIndex', 51).fadeIn(slider.settings.speed, function(){
$(this).css('zIndex', 50);
updateAfterSlideTransition();
});
// slider mode is not "fade"
}else{
// if adaptiveHeight is true and next height is different from current height, animate to the new height
if(slider.settings.adaptiveHeight && slider.viewport.height() != getViewportHeight()){
slider.viewport.animate({height: getViewportHeight()}, slider.settings.adaptiveHeightSpeed);
}
var moveBy = 0;
var position = {left: 0, top: 0};
// if carousel and not infinite loop
if(!slider.settings.infiniteLoop && slider.carousel && slider.active.last){
if(slider.settings.mode == 'horizontal'){
// get the last child position
var lastChild = slider.children.eq(slider.children.length - 1);
position = lastChild.position();
// calculate the position of the last slide
moveBy = slider.viewport.width() - lastChild.outerWidth();
}else{
// get last showing index position
var lastShowingIndex = slider.children.length - slider.settings.minSlides;
position = slider.children.eq(lastShowingIndex).position();
}
// horizontal carousel, going previous while on first slide (infiniteLoop mode)
}else if(slider.carousel && slider.active.last && direction == 'prev'){
// get the last child position
var eq = slider.settings.moveSlides == 1 ? slider.settings.maxSlides - getMoveBy() : ((getPagerQty() - 1) * getMoveBy()) - (slider.children.length - slider.settings.maxSlides);
var lastChild = el.children('.bx-clone').eq(eq);
position = lastChild.position();
// if infinite loop and "Next" is clicked on the last slide
}else if(direction == 'next' && slider.active.index == 0){
// get the last clone position
position = el.find('> .bx-clone').eq(slider.settings.maxSlides).position();
slider.active.last = false;
// normal non-zero requests
}else if(slideIndex >= 0){
var requestEl = slideIndex * getMoveBy();
position = slider.children.eq(requestEl).position();
}
/* If the position doesn't exist
* (e.g. if you destroy the slider on a next click),
* it doesn't throw an error.
*/
if ("undefined" !== typeof(position)) {
var value = slider.settings.mode == 'horizontal' ? -(position.left - moveBy) : -position.top;
// plugin values to be animated
setPositionProperty(value, 'slide', slider.settings.speed);
}
}
}
/**
* Transitions to the next slide in the show
*/
el.goToNextSlide = function(){
// if infiniteLoop is false and last page is showing, disregard call
if (!slider.settings.infiniteLoop && slider.active.last) return;
var pagerIndex = parseInt(slider.active.index) + 1;
el.goToSlide(pagerIndex, 'next');
}
/**
* Transitions to the prev slide in the show
*/
el.goToPrevSlide = function(){
// if infiniteLoop is false and last page is showing, disregard call
if (!slider.settings.infiniteLoop && slider.active.index == 0) return;
var pagerIndex = parseInt(slider.active.index) - 1;
el.goToSlide(pagerIndex, 'prev');
}
/**
* Starts the auto show
*
* @param preventControlUpdate (boolean)
* - if true, auto controls state will not be updated
*/
el.startAuto = function(preventControlUpdate){
// if an interval already exists, disregard call
if(slider.interval) return;
// create an interval
slider.interval = setInterval(function(){
slider.settings.autoDirection == 'next' ? el.goToNextSlide() : el.goToPrevSlide();
}, slider.settings.pause);
// if auto controls are displayed and preventControlUpdate is not true
if (slider.settings.autoControls && preventControlUpdate != true) updateAutoControls('stop');
}
/**
* Stops the auto show
*
* @param preventControlUpdate (boolean)
* - if true, auto controls state will not be updated
*/
el.stopAuto = function(preventControlUpdate){
// if no interval exists, disregard call
if(!slider.interval) return;
// clear the interval
clearInterval(slider.interval);
slider.interval = null;
// if auto controls are displayed and preventControlUpdate is not true
if (slider.settings.autoControls && preventControlUpdate != true) updateAutoControls('start');
}
/**
* Returns current slide index (zero-based)
*/
el.getCurrentSlide = function(){
return slider.active.index;
}
/**
* Returns number of slides in show
*/
el.getSlideCount = function(){
return slider.children.length;
}
/**
* Update all dynamic slider elements
*/
el.redrawSlider = function(){
// resize all children in ratio to new screen size
slider.children.add(el.find('.bx-clone')).outerWidth(getSlideWidth());
// adjust the height
slider.viewport.css('height', getViewportHeight());
// update the slide position
if(!slider.settings.ticker) setSlidePosition();
// if active.last was true before the screen resize, we want
// to keep it last no matter what screen size we end on
if (slider.active.last) slider.active.index = getPagerQty() - 1;
// if the active index (page) no longer exists due to the resize, simply set the index as last
if (slider.active.index >= getPagerQty()) slider.active.last = true;
// if a pager is being displayed and a custom pager is not being used, update it
if(slider.settings.pager && !slider.settings.pagerCustom){
populatePager();
updatePagerActive(slider.active.index);
}
}
/**
* Destroy the current instance of the slider (revert everything back to original state)
*/
el.destroySlider = function(){
// don't do anything if slider has already been destroyed
if(!slider.initialized) return;
slider.initialized = false;
$('.bx-clone', this).remove();
slider.children.each(function() {
$(this).data("origStyle") != undefined ? $(this).attr("style", $(this).data("origStyle")) : $(this).removeAttr('style');
});
$(this).data("origStyle") != undefined ? this.attr("style", $(this).data("origStyle")) : $(this).removeAttr('style');
$(this).unwrap().unwrap();
if(slider.controls.el) slider.controls.el.remove();
if(slider.controls.next) slider.controls.next.remove();
if(slider.controls.prev) slider.controls.prev.remove();
if(slider.pagerEl) slider.pagerEl.remove();
$('.bx-caption', this).remove();
if(slider.controls.autoEl) slider.controls.autoEl.remove();
clearInterval(slider.interval);
if(slider.settings.responsive) $(window).unbind('resize', resizeWindow);
}
/**
* Reload the slider (revert all DOM changes, and re-initialize)
*/
el.reloadSlider = function(settings){
if (settings != undefined) options = settings;
el.destroySlider();
init();
}
init();
// returns the current jQuery object
return this;
}
})(jQuery);