/*
     _ _      _       _
 ___| (_) ___| | __  (_)___
/ __| | |/ __| |/ /  | / __|
\__ \ | | (__|   < _ | \__ \
|___/_|_|\___|_|\_(_)/ |___/
                   |__/

  Author: Ken Wheeler
 Website: http://kenwheeler.github.io
    Docs: http://kenwheeler.github.io/slick
    Repo: http://github.com/kenwheeler/slick
  Issues: http://github.com/kenwheeler/slick/issues

 */

/* global window, document, define, jQuery, setInterval, clearInterval */

(function(factory) {
    'use strict';
    if (typeof define === 'function' && define.amd) {
        define(['jquery'], factory);
    } else {
        factory(jQuery);
    }

}(function($) {
    'use strict';
    var Slick = window.Slick || {};

    Slick = (function() {

        var instanceUid = 0;

        function Slick(element, settings) {

            var _ = this,
                responsiveSettings, breakpoint;

            _.defaults = {
                accessibility: true,
                arrows: true,
                autoplay: false,
                autoplaySpeed: 3000,
                centerMode: false,
                centerPadding: '50px',
                cssEase: 'ease',
                dots: false,
                draggable: true,
                easing: 'linear',
                fade: false,
                infinite: true,
                lazyLoad: 'ondemand',
                onBeforeChange: null,
                onAfterChange: null,
                onInit: null,
                onReInit: null,
                pauseOnHover: true,
                responsive: null,
                slide: 'div',
                slidesToShow: 1,
                slidesToScroll: 1,
                speed: 300,
                swipe: true,
                touchMove: true,
                touchThreshold: 5,
                vertical: false
            };

            _.initials = {
                animating: false,
                autoPlayTimer: null,
                currentSlide: 0,
                currentLeft: null,
                direction: 1,
                $dots: null,
                listWidth: null,
                listHeight: null,
                loadIndex: 0,
                $nextArrow: null,
                $prevArrow: null,
                slideCount: null,
                slideWidth: null,
                $slideTrack: null,
                $slides: null,
                sliding: false,
                slideOffset: 0,
                swipeLeft: null,
                $list: null,
                touchObject: {},
                transformsEnabled: false
            };

            $.extend(_, _.initials);

            _.activeBreakpoint = null;
            _.animType = null;
            _.animProp = null;
            _.breakpoints = [];
            _.breakpointSettings = [];
            _.cssTransitions = false;
            _.paused = false;
            _.positionProp = null;
            _.$slider = $(element);
            _.$slidesCache = null;
            _.transitionType = null;
            _.windowWidth = 0;
            _.windowTimer = null;

            _.options = $.extend({}, _.defaults, settings);

            _.originalSettings = _.options;
            responsiveSettings = _.options.responsive || null;

            if (responsiveSettings && responsiveSettings.length > -1) {
                for (breakpoint in responsiveSettings) {
                    if (responsiveSettings.hasOwnProperty(breakpoint)) {
                        _.breakpoints.push(responsiveSettings[
                            breakpoint].breakpoint);
                        _.breakpointSettings[responsiveSettings[
                            breakpoint].breakpoint] =
                            responsiveSettings[breakpoint].settings;
                    }
                }
                _.breakpoints.sort(function(a, b) {
                    return b - a;
                });
            }

            _.autoPlay = $.proxy(_.autoPlay, _);
            _.autoPlayClear = $.proxy(_.autoPlayClear, _);
            _.changeSlide = $.proxy(_.changeSlide, _);
            _.setPosition = $.proxy(_.setPosition, _);
            _.swipeHandler = $.proxy(_.swipeHandler, _);
            _.dragHandler = $.proxy(_.dragHandler, _);
            _.keyHandler = $.proxy(_.keyHandler, _);
            _.autoPlayIterator = $.proxy(_.autoPlayIterator, _);

            _.instanceUid = instanceUid++;

            _.init();

        }

        return Slick;

    }());

    Slick.prototype.addSlide = function(markup, index, addBefore) {

        var _ = this;

        if (typeof(index) === 'boolean') {
            addBefore = index;
            index = null;
        } else if (index < 0 || (index >= _.slideCount)) {
            return false;
        }

        _.unload();

        if (typeof(index) === 'number') {
            if (index === 0 && _.$slides.length === 0) {
                $(markup).appendTo(_.$slideTrack);
            } else if (addBefore) {
                $(markup).insertBefore(_.$slides.eq(index));
            } else {
                $(markup).insertAfter(_.$slides.eq(index));
            }
        } else {
            if (addBefore === true) {
                $(markup).prependTo(_.$slideTrack);
            } else {
                $(markup).appendTo(_.$slideTrack);
            }
        }

        _.$slides = _.$slideTrack.children(this.options.slide);

        _.$slideTrack.children(this.options.slide).remove();

        _.$slideTrack.append(_.$slides);

        _.reinit();

    };

    Slick.prototype.animateSlide = function(targetLeft,
        callback) {

        var animProps = {}, _ = this;

        if (_.transformsEnabled === false) {
            if (_.options.vertical === false) {
                _.$slideTrack.animate({
                    left: targetLeft
                }, _.options.speed, _.options.easing, callback);
            } else {
                _.$slideTrack.animate({
                    top: targetLeft
                }, _.options.speed, _.options.easing, callback);
            }

        } else {

            if (_.cssTransitions === false) {

                $({
                    animStart: _.currentLeft
                }).animate({
                    animStart: targetLeft
                }, {
                    duration: _.options.speed,
                    easing: _.options.easing,
                    step: function(now) {
                        if (_.options.vertical === false) {
                            animProps[_.animType] = 'translate(' +
                                now + 'px, 0px)';
                            _.$slideTrack.css(animProps);
                        } else {
                            animProps[_.animType] = 'translate(0px,' +
                                now + 'px,0px)';
                            _.$slideTrack.css(animProps);
                        }
                    },
                    complete: function() {
                        if (callback) {
                            callback.call();
                        }
                    }
                });

            } else {

                _.applyTransition();

                if (_.options.vertical === false) {
                    animProps[_.animType] = 'translate3d(' + targetLeft + 'px, 0px, 0px)';
                } else {
                    animProps[_.animType] = 'translate3d(0px,' + targetLeft + 'px, 0px)';
                }
                _.$slideTrack.css(animProps);

                if (callback) {
                    setTimeout(function() {

                        _.disableTransition();

                        callback.call();
                    }, _.options.speed);
                }

            }

        }

    };

    Slick.prototype.applyTransition = function(slide) {

        var _ = this,
            transition, origin;

        if (_.options.fade === false) {
            transition = _.transitionType + ' ' + _.options.speed + 'ms ' + _.options.cssEase;
        } else {
            transition = 'opacity ' + _.options.speed + 'ms ' + _.options.cssEase;
        }

        if (_.options.vertical === false) {
            origin = (_.listWidth / 2) + ' 50%';
        } else {
            origin = '';
        }

        if (_.options.fade === false) {
            _.$slideTrack.css({
                transition: transition,
                transformOrigin: origin
            });
        } else {
            _.$slides.eq(slide).css({
                transition: transition
            });
        }

    };

    Slick.prototype.autoPlay = function() {

        var _ = this;

        if (_.autoPlayTimer) {
            clearInterval(_.autoPlayTimer);
        }

        if (_.slideCount > _.options.slidesToShow && _.paused !== true) {
            _.autoPlayTimer = setInterval(_.autoPlayIterator,
                _.options.autoplaySpeed);
        }

    };

    Slick.prototype.autoPlayClear = function() {

        var _ = this;

        if (_.autoPlayTimer) {
            clearInterval(_.autoPlayTimer);
        }

    };

    Slick.prototype.autoPlayIterator = function() {

        var _ = this;

        if (_.options.infinite === false) {

            if (_.direction === 1) {

                if ((_.currentSlide + 1) === _.slideCount -
                    1) {
                    _.direction = 0;
                }

                _.slideHandler(_.currentSlide + _.options
                    .slidesToScroll);

            } else {

                if ((_.currentSlide - 1 === 0)) {

                    _.direction = 1;

                }

                _.slideHandler(_.currentSlide - _.options
                    .slidesToScroll);

            }

        } else {

            _.slideHandler(_.currentSlide + _.options.slidesToScroll);

        }

    };

    Slick.prototype.buildArrows = function() {

        var _ = this;

        if (_.options.arrows === true && _.slideCount > _.options.slidesToShow) {

            _.$prevArrow = $(
                '<button type="button" class="slick-prev" tabIndex="-1">Previous</button>').appendTo(
                _.$slider.parent());
            _.$nextArrow = $(
                '<button type="button" class="slick-next" tabIndex="-1">Next</button>').appendTo(
                _.$slider.parent());

            if (_.options.infinite !== true) {
                _.$prevArrow.addClass('slick-disabled');
            }

        }

    };

    Slick.prototype.buildDots = function() {

        var _ = this,
            i, dotString;

        if (_.options.dots === true && _.slideCount > _.options.slidesToShow) {

            dotString = '<ul class="slick-dots">';

            for (i = 0; i <= _.getDotCount(); i += 1) {
                dotString += '<li><a href="javascript:void(0)" tabIndex="-1">' + i +
                    '</a></li>';
            }

            dotString += '</ul>';

            _.$dots = $(dotString).appendTo(
                _.$slider.parent());

            _.$dots.find('li').first().addClass(
                'slick-active');

        }

    };

    Slick.prototype.buildOut = function() {

        var _ = this;

        _.$slides = _.$slider.children(_.options.slide +
            ':not(.slick-cloned)').addClass(
            'slick-slide');
        _.slideCount = _.$slides.length;
        _.$slidesCache = _.$slides;

        _.$slider.addClass('slick-slider');

        _.$slideTrack = (_.slideCount === 0) ?
            $('<div class="slick-track"/>').appendTo(_.$slider) :
            _.$slides.wrapAll('<div class="slick-track"/>').parent();

        _.$list = _.$slideTrack.wrap(
            '<div class="slick-list"/>').parent();
        _.$slideTrack.css('opacity', 0);

        if (_.options.accessibility === true) {
            _.$list.prop('tabIndex', 0);
        }

        if (_.options.centerMode === true) {
            _.options.infinite = true;
            _.options.slidesToScroll = 1;
            if (_.options.slidesToShow % 2 === 0) {
                _.options.slidesToShow = 3;
            }
        }

        $('img[data-lazy]', _.$slider).not('[src]').addClass('slick-loading');

        _.setupInfinite();

        _.buildArrows();

        _.buildDots();

        _.setSlideClasses(0);

        if (_.options.draggable === true) {
            _.$list.addClass('draggable');
        }

    };

    Slick.prototype.checkResponsive = function() {

        var _ = this,
            breakpoint, targetBreakpoint;

        if (_.originalSettings.responsive && _.originalSettings
            .responsive.length > -1 && _.originalSettings.responsive !== null) {

            targetBreakpoint = null;

            for (breakpoint in _.breakpoints) {
                if (_.breakpoints.hasOwnProperty(breakpoint)) {
                    if ($(window).width() < _.breakpoints[
                        breakpoint]) {
                        targetBreakpoint = _.breakpoints[
                            breakpoint];
                    }
                }
            }

            if (targetBreakpoint !== null) {
                if (_.activeBreakpoint !== null) {
                    if (targetBreakpoint !== _.activeBreakpoint) {
                        _.activeBreakpoint =
                            targetBreakpoint;
                        _.options = $.extend({}, _.defaults,
                            _.breakpointSettings[
                                targetBreakpoint]);
                        _.refresh();
                    }
                } else {
                    _.activeBreakpoint = targetBreakpoint;
                    _.options = $.extend({}, _.defaults,
                        _.breakpointSettings[
                            targetBreakpoint]);
                    _.refresh();
                }
            } else {
                if (_.activeBreakpoint !== null) {
                    _.activeBreakpoint = null;
                    _.options = $.extend({}, _.defaults,
                        _.originalSettings);
                    _.refresh();
                }
            }

        }

    };

    Slick.prototype.changeSlide = function(event) {

        var _ = this;

        switch (event.data.message) {

            case 'previous':
                _.slideHandler(_.currentSlide - _.options
                    .slidesToScroll);
                break;

            case 'next':
                _.slideHandler(_.currentSlide + _.options
                    .slidesToScroll);
                break;

            case 'index':
                _.slideHandler($(event.target).parent().index() * _.options.slidesToScroll);
                break;

            default:
                return false;
        }

    };

    Slick.prototype.destroy = function() {

        var _ = this;

        _.autoPlayClear();

        _.touchObject = {};

        $('.slick-cloned', _.$slider).remove();
        if (_.$dots) {
            _.$dots.remove();
        }
        if (_.$prevArrow) {
            _.$prevArrow.remove();
            _.$nextArrow.remove();
        }
        _.$slides.unwrap().unwrap();
        _.$slides.removeClass(
            'slick-slide slick-active slick-visible').removeAttr('style');
        _.$slider.removeClass('slick-slider');
        _.$slider.removeClass('slick-initialized');

        _.$list.off('.slick');
        $(window).off('.slick-' + _.instanceUid);
    };

    Slick.prototype.disableTransition = function(slide) {

        var _ = this;

        if (_.options.fade === false) {
            _.$slideTrack.css({
                transition: '',
                transformOrigin: ''
            });
        } else {
            _.$slides.eq(slide).css({
                transition: ''
            });
        }

    };

    Slick.prototype.fadeSlide = function(slideIndex, callback) {

        var _ = this;

        if (_.cssTransitions === false) {

            _.$slides.eq(slideIndex).css({
                zIndex: 1000
            });

            _.$slides.eq(slideIndex).animate({
                opacity: 1
            }, _.options.speed, _.options.easing, callback);

        } else {

            _.applyTransition(slideIndex);

            _.$slides.eq(slideIndex).css({
                opacity: 1,
                zIndex: 1000
            });

            if (callback) {
                setTimeout(function() {

                    _.disableTransition(slideIndex);

                    callback.call();
                }, _.options.speed);
            }

        }

    };

    Slick.prototype.filterSlides = function(filter) {

        var _ = this;

        if (filter !== null) {

            _.unload();

            _.$slideTrack.children(this.options.slide).remove();

            _.$slidesCache.filter(filter).appendTo(_.$slideTrack);

            _.reinit();

        }

    };

    Slick.prototype.getDotCount = function() {

        var _ = this,
            breaker = 0,
            dotCounter = 0,
            dotCount = 0,
            dotLimit;

        dotLimit = _.options.infinite === true ? _.slideCount + _.options.slidesToShow - _.options.slidesToScroll : _.slideCount;

        while (breaker < dotLimit) {
            dotCount++;
            dotCounter += _.options.slidesToScroll;
            breaker = dotCounter + _.options.slidesToShow;
        }

        return dotCount;

    };

    Slick.prototype.getLeft = function(slideIndex) {

        var _ = this,
            targetLeft;

        _.slideOffset = 0;

        if (_.options.infinite === true) {
            if (_.slideCount > _.options.slidesToShow) {
                _.slideOffset = (_.slideWidth * _.options.slidesToShow) * -1;
            }
            if (_.slideCount % _.options.slidesToScroll !== 0) {
                if (slideIndex + _.options.slidesToScroll > _.slideCount && _.slideCount > _.options.slidesToShow) {
                    _.slideOffset = ((_.slideCount % _.options.slidesToShow) * _.slideWidth) * -1;
                }
            }
        } else {
            if (_.slideCount % _.options.slidesToShow !== 0) {
                if (slideIndex + _.options.slidesToScroll > _.slideCount && _.slideCount > _.options.slidesToShow) {
                    _.slideOffset = ((_.slideCount % _.options.slidesToShow) * _.slideWidth);
                }
            }
        }

        if (_.options.centerMode === true) {
            _.slideOffset += _.slideWidth * Math.floor(_.options.slidesToShow / 2) - _.slideWidth;
        }

        if (_.options.vertical === false) {
            targetLeft = ((slideIndex * _.slideWidth) * -1) + _.slideOffset;
        } else {
            _.listHeight = _.$list.height();
            if (_.options.infinite === true) {
                targetLeft = ((slideIndex * _.listHeight) * -1) - _.listHeight;
            } else {
                targetLeft = ((slideIndex * _.listHeight) * -1);
            }
        }

        return targetLeft;

    };

    Slick.prototype.init = function() {

        var _ = this;

        if (!$(_.$slider).hasClass('slick-initialized')) {

            $(_.$slider).addClass('slick-initialized');
            _.buildOut();
            _.setProps();
            _.startLoad();
            _.loadSlider();
            _.initializeEvents();
            _.checkResponsive();
        }

        if (_.options.onInit !== null) {
            _.options.onInit.call(this, _);
        }

    };

    Slick.prototype.initArrowEvents = function() {

        var _ = this;

        if (_.options.arrows === true && _.slideCount > _.options.slidesToShow) {
            _.$prevArrow.on('click.slick', {
                message: 'previous'
            }, _.changeSlide);
            _.$nextArrow.on('click.slick', {
                message: 'next'
            }, _.changeSlide);
        }

    };

    Slick.prototype.initDotEvents = function() {

        var _ = this;

        if (_.options.dots === true && _.slideCount > _.options.slidesToShow) {
            $('li a', _.$dots).on('click.slick', {
                message: 'index'
            }, _.changeSlide);
        }

    };

    Slick.prototype.initializeEvents = function() {

        var _ = this;

        _.initArrowEvents();

        _.initDotEvents();

        _.$list.on('touchstart.slick mousedown.slick', {
            action: 'start'
        }, _.swipeHandler);
        _.$list.on('touchmove.slick mousemove.slick', {
            action: 'move'
        }, _.swipeHandler);
        _.$list.on('touchend.slick mouseup.slick', {
            action: 'end'
        }, _.swipeHandler);
        _.$list.on('touchcancel.slick mouseleave.slick', {
            action: 'end'
        }, _.swipeHandler);

        _.$list.on('dragstart.slick', function(e) {
            e.preventDefault();
        });

        if (_.options.pauseOnHover === true && _.options.autoplay === true) {
            _.$list.on('mouseenter.slick', _.autoPlayClear);
            _.$list.on('mouseleave.slick', _.autoPlay);
        }

        _.$list.on('keydown.slick', _.keyHandler);

        $(window).on('orientationchange.slick.slick-' + _.instanceUid, function() {
            _.checkResponsive();
            _.setPosition();
        });

        $(window).on('resize.slick.slick-' + _.instanceUid, function() {
            if ($(window).width !== _.windowWidth) {
                clearTimeout(_.windowDelay);
                _.windowDelay = window.setTimeout(function() {
                    _.windowWidth = $(window).width();
                    _.checkResponsive();
                    _.setPosition();
                }, 50);
            }
        });

        $(window).on('load.slick.slick-' + _.instanceUid, _.setPosition);

    };

    Slick.prototype.initUI = function() {

        var _ = this;

        if (_.options.arrows === true && _.slideCount > _.options.slidesToShow) {

            _.$prevArrow.show();
            _.$nextArrow.show();

        }

        if (_.options.dots === true && _.slideCount > _.options.slidesToShow) {

            _.$dots.show();

        }

        if (_.options.autoplay === true) {

            _.autoPlay();

        }

    };

    Slick.prototype.keyHandler = function(event) {

        var _ = this;

        if (event.keyCode === 37) {
            _.changeSlide({
                data: {
                    message: 'previous'
                }
            });
        } else if (event.keyCode === 39) {
            _.changeSlide({
                data: {
                    message: 'next'
                }
            });
        }

    };

    Slick.prototype.lazyLoad = function() {

        var _ = this,
            loadRange, cloneRange, rangeStart, rangeEnd;

        if (_.options.centerMode === true) {
            rangeStart = _.options.slidesToShow + _.currentSlide - 1;
            rangeEnd = rangeStart + _.options.slidesToShow + 2;
        } else {
            rangeStart = _.options.infinite ? _.options.slidesToShow + _.currentSlide : _.currentSlide;
            rangeEnd = rangeStart + _.options.slidesToShow;
        }

        loadRange = _.$slider.find('.slick-slide').slice(rangeStart, rangeEnd);

        $('img[data-lazy]', loadRange).not('[src]').each(function() {
            $(this).attr('src', $(this).attr('data-lazy')).removeClass('slick-loading');
        });

        if (_.currentSlide >= _.slideCount - _.options.slidesToShow) {
            cloneRange = _.$slider.find('.slick-cloned').slice(0, _.options.slidesToShow);
            $('img[data-lazy]', cloneRange).not('[src]').each(function() {
                $(this).attr('src', $(this).attr('data-lazy')).removeClass('slick-loading');
            });
        } else if (_.currentSlide === 0) {
            cloneRange = _.$slider.find('.slick-cloned').slice(_.options.slidesToShow * -1);
            $('img[data-lazy]', cloneRange).not('[src]').each(function() {
                $(this).attr('src', $(this).attr('data-lazy')).removeClass('slick-loading');
            });
        }

    };

    Slick.prototype.loadSlider = function() {

        var _ = this;

        _.setPosition();

        _.$slideTrack.css({
            opacity: 1
        });

        if (document.readyState !== 'complete') {

            $(window).load(function() {

                _.$slider.removeClass('slick-loading');

                _.initUI();

                if (_.options.lazyLoad === 'progressive') {
                    _.progressiveLazyLoad();
                }

            });

        } else {

            _.$slider.removeClass('slick-loading');

            _.initUI();

            if (_.options.lazyLoad === 'progressive') {
                _.progressiveLazyLoad();
            }

        }

    };

    Slick.prototype.postSlide = function(index) {

        var _ = this;

        if (_.options.onAfterChange !== null && index !== _.currentSlide) {
            _.options.onAfterChange.call(this, _, index);
        }

        _.animating = false;

        _.currentSlide = index;

        _.setPosition();

        _.swipeLeft = null;

        _.updateDots();

        _.updateArrows();

        if (_.options.autoplay === true && _.paused === false) {
            _.autoPlay();
        }

        _.setSlideClasses(_.currentSlide);

    };

    Slick.prototype.progressiveLazyLoad = function() {

        var _ = this,
            imgCount, targetImage;

        imgCount = $('img[data-lazy]').not('[src]').length;

        if (imgCount > 0) {
            targetImage = $($('img[data-lazy]', _.$slider).not('[src]').get(0));
            targetImage.attr('src', targetImage.attr('data-lazy')).removeClass('slick-loading').load(function() {
                _.progressiveLazyLoad();
            });
        }

    };

    Slick.prototype.refresh = function() {

        var _ = this;

        _.destroy();

        $.extend(_, _.initials);

        _.init();

    };

    Slick.prototype.reinit = function() {

        var _ = this;

        _.$slides = $(_.options.slide +
            ':not(.slick-cloned)', _.$slideTrack).addClass(
            'slick-slide');

        _.slideCount = _.$slides.length;

        if (_.currentSlide >= _.slideCount && _.currentSlide !== 0) {
            _.currentSlide = _.currentSlide - _.options.slidesToScroll;
        }

        _.setProps();

        _.setupInfinite();

        _.buildArrows();

        _.updateArrows();

        _.initArrowEvents();

        _.buildDots();

        _.updateDots();

        _.initDotEvents();

        _.setSlideClasses(0);

        _.setPosition();

        if (_.options.onReInit !== null) {
            _.options.onReInit.call(this, _);
        }

    };

    Slick.prototype.removeSlide = function(index, removeBefore) {

        var _ = this;

        if (typeof(index) === 'boolean') {
            removeBefore = index;
            index = removeBefore === true ? 0 : _.slideCount - 1;
        } else {
            index = removeBefore === true ? --index : index;
        }

        if (_.slideCount < 1 || index < 0 || index > _.slideCount - 1) {
            return false;
        }

        _.unload();

        _.$slideTrack.children(this.options.slide).eq(index).remove();

        _.$slides = _.$slideTrack.children(this.options.slide);

        _.$slideTrack.children(this.options.slide).remove();

        _.$slideTrack.append(_.$slides);

        _.reinit();

    };

    Slick.prototype.setCSS = function(position) {

        var _ = this,
            positionProps = {}, x, y;

        x = _.positionProp == 'left' ? position + 'px' : '0px';
        y = _.positionProp == 'top' ? position + 'px' : '0px';

        positionProps[_.positionProp] = position;

        if (_.transformsEnabled === false) {
            _.$slideTrack.css(positionProps);
        } else {
            positionProps = {};
            if (_.cssTransitions === false) {
                positionProps[_.animType] = 'translate(' + x + ', ' + y + ')';
                _.$slideTrack.css(positionProps);
            } else {
                positionProps[_.animType] = 'translate3d(' + x + ', ' + y + ', 0px)';
                _.$slideTrack.css(positionProps);
            }
        }

    };

    Slick.prototype.setDimensions = function() {

        var _ = this;

        if (_.options.centerMode === true) {
            _.$list.find('.slick-slide').width(_.slideWidth);
        } else {
            _.$list.find('.slick-slide').width(_.slideWidth);
        }


        if (_.options.vertical === false) {
            _.$slideTrack.width(Math.ceil((_.slideWidth * _
                .$slider.find('.slick-slide').length)));
            if (_.options.centerMode === true) {
                _.$list.css({
                    padding: ('0px ' + _.options.centerPadding)
                });
            }
        } else {
            _.$list.height(_.$slides.first().outerHeight());
            _.$slideTrack.height(Math.ceil((_.listHeight * _
                .$slider.find('.slick-slide').length)));
            if (_.options.centerMode === true) {
                _.$list.css({
                    padding: (_.options.centerPadding + ' 0px')
                });
            }
        }

    };

    Slick.prototype.setFade = function() {

        var _ = this,
            targetLeft;

        _.$slides.each(function(index, element) {
            targetLeft = (_.slideWidth * index) * -1;
            $(element).css({
                position: 'relative',
                left: targetLeft,
                top: 0,
                zIndex: 800,
                opacity: 0
            });
        });

        _.$slides.eq(_.currentSlide).css({
            zIndex: 900,
            opacity: 1
        });

    };

    Slick.prototype.setPosition = function() {

        var _ = this;

        _.setValues();
        _.setDimensions();

        if (_.options.fade === false) {
            _.setCSS(_.getLeft(_.currentSlide));
        } else {
            _.setFade();
        }

    };

    Slick.prototype.setProps = function() {

        var _ = this;

        _.positionProp = _.options.vertical === true ? 'top' : 'left';

        if (_.positionProp === 'top') {
            _.$slider.addClass('slick-vertical');
        } else {
            _.$slider.removeClass('slick-vertical');
        }

        if (document.body.style.WebkitTransition !== undefined ||
            document.body.style.MozTransition !== undefined ||
            document.body.style.msTransition !== undefined) {
            _.cssTransitions = true;
        }

        if (document.body.style.MozTransform !== undefined) {
            _.animType = 'MozTransform';
            _.transitionType = '-moz-transform';
        }
        if (document.body.style.webkitTransform !== undefined) {
            _.animType = 'webkitTransform';
            _.transitionType = '-webkit-transform';
        }
        if (document.body.style.msTransform !== undefined) {
            _.animType = 'msTransform';
            _.transitionType = '-ms-transform';
        }

        _.transformsEnabled = (_.animType !== null);

    };

    Slick.prototype.setValues = function() {

        var _ = this;

        _.listWidth = _.$list.width();
        _.listHeight = _.$list.height();
        _.slideWidth = Math.ceil(_.listWidth / _.options
            .slidesToShow);

    };

    Slick.prototype.setSlideClasses = function(index) {

        var _ = this,
            centerOffset, allSlides, indexOffset;

        _.$slider.find('.slick-slide').removeClass('slick-active').removeClass('slick-center');
        allSlides = _.$slider.find('.slick-slide');

        if (_.options.centerMode === true) {

            centerOffset = Math.floor(_.options.slidesToShow / 2);

            if (index >= centerOffset && index <= (_.slideCount - 1) - centerOffset) {
                _.$slides.slice(index - centerOffset, index + centerOffset + 1).addClass('slick-active');
            } else {
                indexOffset = _.options.slidesToShow + index;
                allSlides.slice(indexOffset - centerOffset + 1, indexOffset + centerOffset + 2).addClass('slick-active');
            }

            if (index === 0) {
                allSlides.eq(allSlides.length - 1 - _.options.slidesToShow).addClass('slick-center');
            } else if (index === _.slideCount - 1) {
                allSlides.eq(_.options.slidesToShow).addClass('slick-center');
            }

            _.$slides.eq(index).addClass('slick-center');

        } else {

            if (index > 0 && index < (_.slideCount - _.options.slidesToShow)) {
                _.$slides.slice(index, index + _.options.slidesToShow).addClass('slick-active');
            } else {
                indexOffset = _.options.slidesToShow + index;
                allSlides.slice(indexOffset, indexOffset + _.options.slidesToShow).addClass('slick-active');
            }

        }

        if (_.options.lazyLoad === 'ondemand') {
            _.lazyLoad();
        }

    };

    Slick.prototype.setupInfinite = function() {

        var _ = this,
            i, slideIndex, infiniteCount;

        if (_.options.fade === true || _.options.vertical === true) {
            _.options.slidesToShow = 1;
            _.options.slidesToScroll = 1;
            _.options.centerMode = false;
        }

        if (_.options.infinite === true && _.options.fade === false) {

            slideIndex = null;

            if (_.slideCount > _.options.slidesToShow) {

                if (_.options.centerMode === true) {
                    infiniteCount = _.options.slidesToShow + 1;
                } else {
                    infiniteCount = _.options.slidesToShow;
                }

                for (i = _.slideCount; i > (_.slideCount -
                    infiniteCount); i -= 1) {
                    slideIndex = i - 1;
                    $(_.$slides[slideIndex]).clone().prependTo(
                        _.$slideTrack).addClass('slick-cloned');
                }
                for (i = 0; i < infiniteCount; i += 1) {
                    slideIndex = i;
                    $(_.$slides[slideIndex]).clone().appendTo(
                        _.$slideTrack).addClass('slick-cloned');
                }

            }

        }

    };

    Slick.prototype.slideHandler = function(index) {

        var targetSlide, animSlide, slideLeft, targetLeft = null,
            _ = this;

        if (_.animating === true) {
            return false;
        }

        targetSlide = index;
        targetLeft = _.getLeft(targetSlide);
        slideLeft = _.getLeft(_.currentSlide);

        if (_.options.infinite === false && (index < 0 || index > (_.slideCount - _.options.slidesToShow))) {
            targetSlide = _.currentSlide;
            _.animateSlide(slideLeft, function() {
                _.postSlide(targetSlide);
            });
            return false;
        }

        if (_.options.autoplay === true) {
            clearInterval(_.autoPlayTimer);
        }

        _.currentLeft = _.swipeLeft === null ? slideLeft : _.swipeLeft;

        if (targetSlide < 0) {
            if (_.slideCount % _.options.slidesToScroll !== 0) {
                animSlide = _.slideCount - (_.slideCount % _.options.slidesToScroll);
            } else {
                animSlide = _.slideCount - _.options.slidesToScroll;
            }
        } else if (targetSlide > (_.slideCount - 1)) {
            animSlide = 0;
        } else {
            animSlide = targetSlide;
        }

        _.animating = true;

        if (_.options.onBeforeChange !== null && index !== _.currentSlide) {
            _.options.onBeforeChange.call(this, _, _.currentSlide);
        }

        if (_.options.fade === true) {
            _.fadeSlide(animSlide, function() {
                _.postSlide(animSlide);
            });
            return false;
        }

        _.animateSlide(targetLeft, function() {
            _.postSlide(animSlide);
        });

    };

    Slick.prototype.startLoad = function() {

        var _ = this;

        if (_.options.arrows === true && _.slideCount > _.options.slidesToShow) {

            _.$prevArrow.hide();
            _.$nextArrow.hide();

        }

        if (_.options.dots === true && _.slideCount > _.options.slidesToShow) {

            _.$dots.hide();

        }

        _.$slider.addClass('slick-loading');

    };

    Slick.prototype.swipeDirection = function() {

        var xDist, yDist, r, swipeAngle, _ = this;

        xDist = _.touchObject.startX - _.touchObject.curX;
        yDist = _.touchObject.startY - _.touchObject.curY;
        r = Math.atan2(yDist, xDist);

        swipeAngle = Math.round(r * 180 / Math.PI);
        if (swipeAngle < 0) {
            swipeAngle = 360 - Math.abs(swipeAngle);
        }

        if ((swipeAngle <= 45) && (swipeAngle >= 0)) {
            return 'left';
        }
        if ((swipeAngle <= 360) && (swipeAngle >= 315)) {
            return 'left';
        }
        if ((swipeAngle >= 135) && (swipeAngle <= 225)) {
            return 'right';
        }

        return 'vertical';

    };

    Slick.prototype.swipeEnd = function(event) {

        var _ = this;

        _.$list.removeClass('dragging');

        if (_.touchObject.curX === undefined) {
            return false;
        }

        if (_.touchObject.swipeLength >= _.touchObject.minSwipe) {

            $(event.target).on('click.slick', function(event) {
                event.stopImmediatePropagation();
                event.stopPropagation();
                event.preventDefault();
                $(event.target).off('click.slick');
            });

            switch (_.swipeDirection()) {
                case 'left':
                    _.slideHandler(_.currentSlide + _.options.slidesToScroll);
                    _.touchObject = {};
                    break;

                case 'right':
                    _.slideHandler(_.currentSlide - _.options.slidesToScroll);
                    _.touchObject = {};
                    break;
            }

        } else {
            _.slideHandler(_.currentSlide);
            _.touchObject = {};
        }

    };

    Slick.prototype.swipeHandler = function(event) {

        var _ = this;

        if (event.originalEvent && event.originalEvent.touches && _.options.swipe === false) {
            return false;
        } else if (_.options.draggable === false) {
            return false;
        }

        _.touchObject.fingerCount = event.originalEvent && event.originalEvent.touches !== undefined ?
            event.originalEvent.touches.length : 1;

        _.touchObject.minSwipe = _.listWidth / _.options
            .touchThreshold;

        switch (event.data.action) {

            case 'start':
                _.swipeStart(event);
                break;

            case 'move':
                _.swipeMove(event);
                break;

            case 'end':
                _.swipeEnd(event);
                break;

        }

    };

    Slick.prototype.swipeMove = function(event) {

        var _ = this,
            curLeft, swipeDirection, positionOffset, touches;

        touches = event.originalEvent !== undefined ? event.originalEvent.touches : null;

        curLeft = _.getLeft(_.currentSlide);

        if (!_.$list.hasClass('dragging') || touches && touches.length !== 1) {
            return false;
        }

        _.touchObject.curX = touches !== undefined ? touches[0].pageX : event.clientX;
        _.touchObject.curY = touches !== undefined ? touches[0].pageY : event.clientY;

        _.touchObject.swipeLength = Math.round(Math.sqrt(
            Math.pow(_.touchObject.curX - _.touchObject.startX, 2)));

        swipeDirection = _.swipeDirection();

        if (swipeDirection === 'vertical') {
            return false;
        }

        if (event.originalEvent !== undefined) {
            event.preventDefault();
        }

        positionOffset = _.touchObject.curX > _.touchObject.startX ? 1 : -1;

        if (_.options.vertical === false) {
            _.swipeLeft = curLeft + _.touchObject.swipeLength * positionOffset;
        } else {
            _.swipeLeft = curLeft + (_.touchObject
                .swipeLength * (_.listHeight / _.listWidth)) * positionOffset;
        }

        if (_.options.fade === true || _.options.touchMove === false) {
            return false;
        }

        if (_.animating === true) {
            _.swipeLeft = null;
            return false;
        }

        _.setCSS(_.swipeLeft);

    };

    Slick.prototype.swipeStart = function(event) {

        var _ = this,
            touches;

        if (_.touchObject.fingerCount !== 1 || _.slideCount <= _.options.slidesToShow) {
            _.touchObject = {};
            return false;
        }

        if (event.originalEvent !== undefined && event.originalEvent.touches !== undefined) {
            touches = event.originalEvent.touches[0];
        }

        _.touchObject.startX = _.touchObject.curX = touches !== undefined ? touches.pageX : event.clientX;
        _.touchObject.startY = _.touchObject.curY = touches !== undefined ? touches.pageY : event.clientY;

        _.$list.addClass('dragging');

    };

    Slick.prototype.unfilterSlides = function() {

        var _ = this;

        if (_.$slidesCache !== null) {

            _.unload();

            _.$slideTrack.children(this.options.slide).remove();

            _.$slidesCache.appendTo(_.$slideTrack);

            _.reinit();

        }

    };

    Slick.prototype.unload = function() {

        var _ = this;

        $('.slick-cloned', _.$slider).remove();
        if (_.$dots) {
            _.$dots.remove();
        }
        if (_.$prevArrow) {
            _.$prevArrow.remove();
            _.$nextArrow.remove();
        }
        _.$slides.removeClass(
            'slick-slide slick-active slick-visible').removeAttr('style');

    };

    Slick.prototype.updateArrows = function() {

        var _ = this;

        if (_.options.arrows === true && _.options.infinite !==
            true && _.slideCount > _.options.slidesToShow) {
            _.$prevArrow.removeClass('slick-disabled');
            _.$nextArrow.removeClass('slick-disabled');
            if (_.currentSlide === 0) {
                _.$prevArrow.addClass('slick-disabled');
                _.$nextArrow.removeClass('slick-disabled');
            } else if (_.currentSlide >= _.slideCount - _.options.slidesToShow) {
                _.$nextArrow.addClass('slick-disabled');
                _.$prevArrow.removeClass('slick-disabled');
            }
        }

    };

    Slick.prototype.updateDots = function() {

        var _ = this;

        if (_.$dots !== null) {

            _.$dots.find('li').removeClass('slick-active');
            _.$dots.find('li').eq(_.currentSlide / _.options.slidesToScroll).addClass(
                'slick-active');

        }

    };

    $.fn.slick = function(options) {
        var _ = this;
        return _.each(function(index, element) {

            element.slick = new Slick(element, options);

        });
    };

    $.fn.slickAdd = function(slide, slideIndex, addBefore) {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.addSlide(slide, slideIndex, addBefore);

        });
    };

    $.fn.slickFilter = function(filter) {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.filterSlides(filter);

        });
    };

    $.fn.slickGoTo = function(slide) {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.slideHandler(slide);

        });
    };

    $.fn.slickNext = function() {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.changeSlide({
                data: {
                    message: 'next'
                }
            });

        });
    };

    $.fn.slickPause = function() {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.autoPlayClear();
            element.slick.paused = true;

        });
    };

    $.fn.slickPlay = function() {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.paused = false;
            element.slick.autoPlay();

        });
    };

    $.fn.slickPrev = function() {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.changeSlide({
                data: {
                    message: 'previous'
                }
            });

        });
    };

    $.fn.slickRemove = function(slideIndex, removeBefore) {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.removeSlide(slideIndex, removeBefore);

        });
    };

    $.fn.slickSetOption = function(option, value, refresh) {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.options[option] = value;

            if (refresh === true) {
                element.slick.unload();
                element.slick.reinit();
            }

        });
    };

    $.fn.slickUnfilter = function() {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.unfilterSlides();

        });
    };

    $.fn.unslick = function() {
        var _ = this;
        return _.each(function(index, element) {

            element.slick.destroy();

        });
    };

}));