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jquery-bxslider.js

Uploaded on Dec 14 2021 21:16 by marcelo-legui

/**
* bxSlider v4.2.12
* Copyright 2013-2015 Steven Wanderski
* Written while drinking Belgian ales and listening to jazz
* Licensed under MIT (http://opensource.org/licenses/MIT)
*/

;(function($) {

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,
slideZIndex: 50,
wrapperClass: 'bx-wrapper',

// TOUCH
touchEnabled: true,
swipeThreshold: 50,
oneToOneTouch: true,
preventDefaultSwipeX: true,
preventDefaultSwipeY: false,

// ACCESSIBILITY
ariaLive: true,
ariaHidden: true,

// KEYBOARD
keyboardEnabled: 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',
stopAutoOnClick: false,
autoHover: false,
autoDelay: 0,
autoSlideForOnePage: false,

// CAROUSEL
minSlides: 1,
maxSlides: 1,
moveSlides: 0,
slideWidth: 0,
shrinkItems: false,

// CALLBACKS
onSliderLoad: function() { return true; },
onSlideBefore: function() { return true; },
onSlideAfter: function() { return true; },
onSlideNext: function() { return true; },
onSlidePrev: function() { return true; },
onSliderResize: function() { return true; }
};

$.fn.bxSlider = function(options) {

if (this.length === 0) {
return this;
}

// support multiple 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
el = this,
// get the original window dimens (thanks a lot IE)
windowWidth = $(window).width(),
windowHeight = $(window).height();

// Return if slider is already initialized
if ($(el).data('bxSlider')) { return; }

/**
* ===================================================================================
* = PRIVATE FUNCTIONS
* ===================================================================================
*/

/**
* Initializes namespace settings to be used throughout plugin
*/
var init = function() {
// Return if slider is already initialized
if ($(el).data('bxSlider')) { return; }
// 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 ? true : false;
// 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
props = ['WebkitPerspective', 'MozPerspective', 'OPerspective', 'msPerspective'];
// test for each property
for (var i = 0; i < props.length; i++) {
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() {
var preloadSelector = slider.children.eq(slider.settings.startSlide); // set the default preload selector (visible)

// wrap el in a wrapper
el.wrap('<div class="' + slider.settings.wrapperClass + '"><div class="bx-viewport"></div></div>');
// store a namespace reference to .bx-viewport
slider.viewport = el.parent();

// add aria-live if the setting is enabled and ticker mode is disabled
if (slider.settings.ariaLive && !slider.settings.ticker) {
slider.viewport.attr('aria-live', 'polite');
}
// 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 * 1000 + 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';
}
// make modifications to the viewport (.bx-viewport)
slider.viewport.css({
width: '100%',
overflow: 'hidden',
position: 'relative'
});
slider.viewport.parent().css({
maxWidth: getViewportMaxWidth()
});
// 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: slider.settings.slideZIndex, 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(); }
if (slider.settings.preloadImages === 'all' || slider.settings.ticker) { preloadSelector = slider.children; }
// only check for control addition if not in "ticker" mode
if (!slider.settings.ticker) {
// 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 pager is requested, add it
if (slider.settings.pager) { appendPager(); }
// 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;
}
loadElements(preloadSelector, start);
};

var loadElements = function(selector, callback) {
var total = selector.find('img:not([src=""]), iframe').length,
count = 0;
if (total === 0) {
callback();
return;
}
selector.find('img:not([src=""]), iframe').each(function() {
$(this).one('load error', function() {
if (++count === total) { callback(); }
}).each(function() {
if (this.complete) { $(this).trigger('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,
sliceAppend = slider.children.slice(0, slice).clone(true).addClass('bx-clone'),
slicePrepend = slider.children.slice(-slice).clone(true).addClass('bx-clone');
if (slider.settings.ariaHidden) {
sliceAppend.attr('aria-hidden', true);
slicePrepend.attr('aria-hidden', true);
}
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.call(el, 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 and has more than 1 page, start the show
if (slider.settings.auto && slider.settings.autoStart && (getPagerQty() > 1 || slider.settings.autoSlideForOnePage)) { 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(); }
// if keyboardEnabled is true, setup the keyboard events
if (slider.settings.keyboardEnabled && !slider.settings.ticker) {
$(document).keydown(keyPress);
}
};

/**
* 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());
}

if (slider.viewport.css('box-sizing') === 'border-box') {
height += parseFloat(slider.viewport.css('padding-top')) + parseFloat(slider.viewport.css('padding-bottom')) +
parseFloat(slider.viewport.css('border-top-width')) + parseFloat(slider.viewport.css('border-bottom-width'));
} else if (slider.viewport.css('box-sizing') === 'padding-box') {
height += parseFloat(slider.viewport.css('padding-top')) + parseFloat(slider.viewport.css('padding-bottom'));
}

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() {
var newElWidth = slider.settings.slideWidth, // start with any user-supplied slide width
wrapWidth = slider.viewport.width(); // get the current 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) {
return newElWidth;
} else if (wrapWidth < slider.minThreshold) {
newElWidth = (wrapWidth - (slider.settings.slideMargin * (slider.settings.minSlides - 1))) / slider.settings.minSlides;
} else if (slider.settings.shrinkItems) {
newElWidth = Math.floor((wrapWidth + slider.settings.slideMargin) / (Math.ceil((wrapWidth + slider.settings.slideMargin) / (newElWidth + slider.settings.slideMargin))) - slider.settings.slideMargin);
}
}
return newElWidth;
};

/**
* Returns the number of slides currently visible in the viewport (includes partially visible slides)
*/
var getNumberSlidesShowing = function() {
var slidesShowing = 1,
childWidth = null;
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 maxThreshold, 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 {
childWidth = slider.children.first().width() + slider.settings.slideMargin;
slidesShowing = Math.floor((slider.viewport.width() +
slider.settings.slideMargin) / 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,
breakPoint = 0,
counter = 0;
// if moveSlides is specified by the user
if (slider.settings.moveSlides > 0) {
if (slider.settings.infiniteLoop) {
pagerQty = Math.ceil(slider.children.length / getMoveBy());
} else {
// 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 individual 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() {
var position, lastChild, lastShowingIndex;
// 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
lastChild = slider.children.last();
position = lastChild.position();
// set the left position
setPositionProperty(-(position.left - (slider.viewport.width() - lastChild.outerWidth())), 'reset', 0);
} else if (slider.settings.mode === 'vertical') {
// get the last showing index's position
lastShowingIndex = slider.children.length - slider.settings.minSlides;
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
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 respective 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) 'slide', '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) {
var animateObj, propValue;
// use CSS transform
if (slider.usingCSS) {
// determine the translate3d value
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);
if (duration !== 0) {
// bind a callback method - executes when CSS transition completes
el.bind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd', function(e) {
//make sure it's the correct one
if (!$(e.target).is(el)) { return; }
// unbind the callback
el.unbind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd');
updateAfterSlideTransition();
});
} else { //duration = 0
updateAfterSlideTransition();
}
} else if (type === 'reset') {
el.css(slider.animProp, propValue);
} else if (type === 'ticker') {
// make the transition use 'linear'
el.css('-' + slider.cssPrefix + '-transition-timing-function', 'linear');
el.css(slider.animProp, propValue);
if (duration !== 0) {
el.bind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd', function(e) {
//make sure it's the correct one
if (!$(e.target).is(el)) { return; }
// unbind the callback
el.unbind('transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd');
// reset the position
setPositionProperty(params.resetValue, 'reset', 0);
// start the loop again
tickerLoop();
});
} else { //duration = 0
setPositionProperty(params.resetValue, 'reset', 0);
tickerLoop();
}
}
// use JS animate
} else {
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, duration, '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 = '',
linkContent = '',
pagerQty = getPagerQty();
// loop through each pager item
for (var i = 0; i < pagerQty; i++) {
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) || slider.settings.pagerCustom) {
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.on('click touchend', 'a', 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 touchend', clickNextBind);
slider.controls.prev.bind('click touchend', clickPrevBind);
// if nextSelector was supplied, populate it
if (slider.settings.nextSelector) {
$(slider.settings.nextSelector).append(slider.controls.next);
}
// if prevSelector 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.on('click', '.bx-start', clickStartBind);
slider.controls.autoEl.on('click', '.bx-stop', 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) {
e.preventDefault();
if (slider.controls.el.hasClass('disabled')) { return; }
// if auto show is running, stop it
if (slider.settings.auto && slider.settings.stopAutoOnClick) { el.stopAuto(); }
el.goToNextSlide();
};

/**
* Click prev binding
*
* @param e (event)
* - DOM event object
*/
var clickPrevBind = function(e) {
e.preventDefault();
if (slider.controls.el.hasClass('disabled')) { return; }
// if auto show is running, stop it
if (slider.settings.auto && slider.settings.stopAutoOnClick) { el.stopAuto(); }
el.goToPrevSlide();
};

/**
* 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) {
var pagerLink, pagerIndex;
e.preventDefault();
if (slider.controls.el.hasClass('disabled')) {
return;
}
// if auto show is running, stop it
if (slider.settings.auto && slider.settings.stopAutoOnClick) { el.stopAuto(); }
pagerLink = $(e.currentTarget);
if (pagerLink.attr('data-slide-index') !== undefined) {
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); }
}
};

/**
* 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 infinite 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 (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.call(el, 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');
}
}
};

/**
* Initializes 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();

//add focus and blur events to ensure its running if timeout gets paused
$(window).focus(function() {
el.startAuto();
}).blur(function() {
el.stopAuto();
});
}
// 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 argument 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 argument which will prevent control update
el.startAuto(true);
// reset the autoPaused value
slider.autoPaused = null;
}
});
}
};

/**
* Initializes the ticker process
*/
var initTicker = function() {
var startPosition = 0,
position, transform, value, idx, ratio, property, newSpeed, totalDimens;
// 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'));
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) {
if (slider.usingCSS) {
idx = slider.settings.mode === 'horizontal' ? 4 : 5;
slider.viewport.hover(function() {
transform = el.css('-' + slider.cssPrefix + '-transform');
value = parseFloat(transform.split(',')[idx]);
setPositionProperty(value, 'reset', 0);
}, function() {
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)
ratio = slider.settings.speed / totalDimens;
// determine which property to use
property = slider.settings.mode === 'horizontal' ? 'left' : 'top';
// calculate the new speed
newSpeed = ratio * (totalDimens - (Math.abs(parseInt(value))));
tickerLoop(newSpeed);
});
} else {
// on el hover
slider.viewport.hover(function() {
el.stop();
}, function() {
// calculate the total width of children (used to calculate the speed ratio)
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)
ratio = slider.settings.speed / totalDimens;
// determine which property to use
property = slider.settings.mode === 'horizontal' ? 'left' : 'top';
// calculate the new speed
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) {
var speed = resumeSpeed ? resumeSpeed : slider.settings.speed,
position = {left: 0, top: 0},
reset = {left: 0, top: 0},
animateProperty, resetValue, params;

// 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();
}
animateProperty = slider.settings.mode === 'horizontal' ? -position.left : -position.top;
resetValue = slider.settings.mode === 'horizontal' ? -reset.left : -reset.top;
params = {resetValue: resetValue};
setPositionProperty(animateProperty, 'ticker', speed, params);
};

/**
* Check if el is on screen
*/
var isOnScreen = function(el) {
var win = $(window),
viewport = {
top: win.scrollTop(),
left: win.scrollLeft()
},
bounds = el.offset();

viewport.right = viewport.left + win.width();
viewport.bottom = viewport.top + win.height();
bounds.right = bounds.left + el.outerWidth();
bounds.bottom = bounds.top + el.outerHeight();

return (!(viewport.right < bounds.left || viewport.left > bounds.right || viewport.bottom < bounds.top || viewport.top > bounds.bottom));
};

/**
* Initializes keyboard events
*/
var keyPress = function(e) {
var activeElementTag = document.activeElement.tagName.toLowerCase(),
tagFilters = 'input|textarea',
p = new RegExp(activeElementTag,['i']),
result = p.exec(tagFilters);

if (result == null && isOnScreen(el)) {
if (e.keyCode === 39) {
clickNextBind(e);
return false;
} else if (e.keyCode === 37) {
clickPrevBind(e);
return false;
}
}
};

/**
* 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 MSPointerDown pointerdown', onTouchStart);

//for browsers that have implemented pointer events and fire a click after
//every pointerup regardless of whether pointerup is on same screen location as pointerdown or not
slider.viewport.on('click', '.bxslider a', function(e) {
if (slider.viewport.hasClass('click-disabled')) {
e.preventDefault();
slider.viewport.removeClass('click-disabled');
}
});
};

/**
* Event handler for "touchstart"
*
* @param e (event)
* - DOM event object
*/
var onTouchStart = function(e) {
//disable slider controls while user is interacting with slides to avoid slider freeze that happens on touch devices when a slide swipe happens immediately after interacting with slider controls
slider.controls.el.addClass('disabled');

if (slider.working) {
e.preventDefault();
slider.controls.el.removeClass('disabled');
} else {
// record the original position when touch starts
slider.touch.originalPos = el.position();
var orig = e.originalEvent,
touchPoints = (typeof orig.changedTouches !== 'undefined') ? orig.changedTouches : [orig];
// record the starting touch x, y coordinates
slider.touch.start.x = touchPoints[0].pageX;
slider.touch.start.y = touchPoints[0].pageY;

if (slider.viewport.get(0).setPointerCapture) {
slider.pointerId = orig.pointerId;
slider.viewport.get(0).setPointerCapture(slider.pointerId);
}
// bind a "touchmove" event to the viewport
slider.viewport.bind('touchmove MSPointerMove pointermove', onTouchMove);
// bind a "touchend" event to the viewport
slider.viewport.bind('touchend MSPointerUp pointerup', onTouchEnd);
slider.viewport.bind('MSPointerCancel pointercancel', onPointerCancel);
}
};

/**
* Cancel Pointer for Windows Phone
*
* @param e (event)
* - DOM event object
*/
var onPointerCancel = function(e) {
/* onPointerCancel handler is needed to deal with situations when a touchend
doesn't fire after a touchstart (this happens on windows phones only) */
setPositionProperty(slider.touch.originalPos.left, 'reset', 0);

//remove handlers
slider.controls.el.removeClass('disabled');
slider.viewport.unbind('MSPointerCancel pointercancel', onPointerCancel);
slider.viewport.unbind('touchmove MSPointerMove pointermove', onTouchMove);
slider.viewport.unbind('touchend MSPointerUp pointerup', onTouchEnd);
if (slider.viewport.get(0).releasePointerCapture) {
slider.viewport.get(0).releasePointerCapture(slider.pointerId);
}
};

/**
* Event handler for "touchmove"
*
* @param e (event)
* - DOM event object
*/
var onTouchMove = function(e) {
var orig = e.originalEvent,
touchPoints = (typeof orig.changedTouches !== 'undefined') ? orig.changedTouches : [orig],
// if scrolling on y axis, do not prevent default
xMovement = Math.abs(touchPoints[0].pageX - slider.touch.start.x),
yMovement = Math.abs(touchPoints[0].pageY - slider.touch.start.y),
value = 0,
change = 0;

// 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) {
// if horizontal, drag along x axis
if (slider.settings.mode === 'horizontal') {
change = touchPoints[0].pageX - slider.touch.start.x;
value = slider.touch.originalPos.left + change;
// if vertical, drag along y axis
} else {
change = touchPoints[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 MSPointerMove pointermove', onTouchMove);
//enable slider controls as soon as user stops interacing with slides
slider.controls.el.removeClass('disabled');
var orig = e.originalEvent,
touchPoints = (typeof orig.changedTouches !== 'undefined') ? orig.changedTouches : [orig],
value = 0,
distance = 0;
// record end x, y positions
slider.touch.end.x = touchPoints[0].pageX;
slider.touch.end.y = touchPoints[0].pageY;
// if fade mode, check if absolute x distance clears the threshold
if (slider.settings.mode === 'fade') {
distance = Math.abs(slider.touch.start.x - slider.touch.end.x);
if (distance >= slider.settings.swipeThreshold) {
if (slider.touch.start.x > slider.touch.end.x) {
el.goToNextSlide();
} else {
el.goToPrevSlide();
}
el.stopAuto();
}
// not fade mode
} else {
// 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) {
if (distance < 0) {
el.goToNextSlide();
} else {
el.goToPrevSlide();
}
el.stopAuto();
} else {
// el.animate(property, 200);
setPositionProperty(value, 'reset', 200);
}
}
}
slider.viewport.unbind('touchend MSPointerUp pointerup', onTouchEnd);
if (slider.viewport.get(0).releasePointerCapture) {
slider.viewport.get(0).releasePointerCapture(slider.pointerId);
}
};

/**
* Window resize event callback
*/
var resizeWindow = function(e) {
// don't do anything if slider isn't initialized.
if (!slider.initialized) { return; }
// Delay if slider working.
if (slider.working) {
window.setTimeout(resizeWindow, 10);
} else {
// get the new window dimens (again, thank you IE)
var windowWidthNew = $(window).width(),
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();
// Call user resize handler
slider.settings.onSliderResize.call(el, slider.active.index);
}
}
};

/**
* Adds an aria-hidden=true attribute to each element
*
* @param startVisibleIndex (int)
* - the first visible element's index
*/
var applyAriaHiddenAttributes = function(startVisibleIndex) {
var numberOfSlidesShowing = getNumberSlidesShowing();
// only apply attributes if the setting is enabled and not in ticker mode
if (slider.settings.ariaHidden && !slider.settings.ticker) {
// add aria-hidden=true to all elements
slider.children.attr('aria-hidden', 'true');
// get the visible elements and change to aria-hidden=false
slider.children.slice(startVisibleIndex, startVisibleIndex + numberOfSlidesShowing).attr('aria-hidden', 'false');
}
};

/**
* Returns index according to present page range
*
* @param slideOndex (int)
* - the desired slide index
*/
var setSlideIndex = function(slideIndex) {
if (slideIndex < 0) {
if (slider.settings.infiniteLoop) {
return getPagerQty() - 1;
}else {
//we don't go to undefined slides
return slider.active.index;
}
// if slideIndex is greater than children length, set active index to 0 (this happens during infinite loop)
} else if (slideIndex >= getPagerQty()) {
if (slider.settings.infiniteLoop) {
return 0;
} else {
//we don't move to undefined pages
return slider.active.index;
}
// set active index to requested slide
} else {
return slideIndex;
}
};

/**
* ===================================================================================
* = 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) {
// onSlideBefore, onSlideNext, onSlidePrev callbacks
// Allow transition canceling based on returned value
var performTransition = true,
moveBy = 0,
position = {left: 0, top: 0},
lastChild = null,
lastShowingIndex, eq, value, requestEl;
// store the old index
slider.oldIndex = slider.active.index;
//set new index
slider.active.index = setSlideIndex(slideIndex);

// if plugin is currently in motion, ignore request
if (slider.working || slider.active.index === slider.oldIndex) { return; }
// declare that plugin is in motion
slider.working = true;

performTransition = slider.settings.onSlideBefore.call(el, slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index);

// If transitions canceled, reset and return
if (typeof (performTransition) !== 'undefined' && !performTransition) {
slider.active.index = slider.oldIndex; // restore old index
slider.working = false; // is not in motion
return;
}

if (direction === 'next') {
// Prevent canceling in future functions or lack there-of from negating previous commands to cancel
if (!slider.settings.onSlideNext.call(el, slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index)) {
performTransition = false;
}
} else if (direction === 'prev') {
// Prevent canceling in future functions or lack there-of from negating previous commands to cancel
if (!slider.settings.onSlidePrev.call(el, slider.children.eq(slider.active.index), slider.oldIndex, slider.active.index)) {
performTransition = false;
}
}

// check if last slide
slider.active.last = slider.active.index >= getPagerQty() - 1;
// update the pager with active class
if (slider.settings.pager || slider.settings.pagerCustom) { 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', slider.settings.slideZIndex + 1).fadeIn(slider.settings.speed, function() {
$(this).css('zIndex', slider.settings.slideZIndex);
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);
}
// 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
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
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
eq = slider.settings.moveSlides === 1 ? slider.settings.maxSlides - getMoveBy() : ((getPagerQty() - 1) * getMoveBy()) - (slider.children.length - slider.settings.maxSlides);
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) {
//parseInt is applied to allow floats for slides/page
requestEl = slideIndex * parseInt(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 (typeof (position) !== 'undefined') {
value = slider.settings.mode === 'horizontal' ? -(position.left - moveBy) : -position.top;
// plugin values to be animated
setPositionProperty(value, 'slide', slider.settings.speed);
} else {
slider.working = false;
}
}
if (slider.settings.ariaHidden) { applyAriaHiddenAttributes(slider.active.index * getMoveBy()); }
};

/**
* 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() {
if (slider.settings.autoDirection === 'next') {
el.goToNextSlide();
} else {
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 current slide element
*/
el.getCurrentSlideElement = function() {
return slider.children.eq(slider.active.index);
};

/**
* Returns a slide element
* @param index (int)
* - The index (zero-based) of the element you want returned.
*/
el.getSlideElement = function(index) {
return slider.children.eq(index);
};

/**
* Returns number of slides in show
*/
el.getSlideCount = function() {
return slider.children.length;
};

/**
* Return slider.working variable
*/
el.isWorking = function() {
return slider.working;
};

/**
* 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);
}
if (slider.settings.ariaHidden) { applyAriaHiddenAttributes(slider.active.index * getMoveBy()); }
};

/**
* 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;
$('.bx-clone', this).remove();
slider.children.each(function() {
if ($(this).data('origStyle') !== undefined) {
$(this).attr('style', $(this).data('origStyle'));
} else {
$(this).removeAttr('style');
}
});
if ($(this).data('origStyle') !== undefined) {
this.attr('style', $(this).data('origStyle'));
} else {
$(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.settings.controls && !slider.settings.pagerCustom) { 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); }
if (slider.settings.keyboardEnabled) { $(document).unbind('keydown', keyPress); }
//remove self reference in data
$(this).removeData('bxSlider');
};

/**
* Reload the slider (revert all DOM changes, and re-initialize)
*/
el.reloadSlider = function(settings) {
if (settings !== undefined) { options = settings; }
el.destroySlider();
init();
//store reference to self in order to access public functions later
$(el).data('bxSlider', this);
};

init();

$(el).data('bxSlider', this);

// returns the current jQuery object
return this;
};

})(jQuery);

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