/*! carousel transition plugin for Cycle2; version: 20130528 */ (function($) { "use strict"; $( document ).on('cycle-bootstrap', function( e, opts, API ) { if ( opts.fx !== 'carousel' ) return; API.getSlideIndex = function( el ) { var slides = this.opts()._carouselWrap.children(); var i = slides.index( el ); return i % slides.length; }; // override default 'next' function API.next = function() { var count = opts.reverse ? -1 : 1; if ( opts.allowWrap === false && ( opts.currSlide + count ) > opts.slideCount - opts.carouselVisible ) return; opts.API.advanceSlide( count ); opts.API.trigger('cycle-next', [ opts ]).log('cycle-next'); }; }); $.fn.cycle.transitions.carousel = { // transition API impl preInit: function( opts ) { opts.hideNonActive = false; opts.container.on('cycle-destroyed', $.proxy(this.onDestroy, opts.API)); // override default API implementation opts.API.stopTransition = this.stopTransition; // issue #10 for (var i=0; i < opts.startingSlide; i++) { opts.container.append( opts.slides[0] ); } }, // transition API impl postInit: function( opts ) { var i, j, slide, pagerCutoffIndex, wrap; var vert = opts.carouselVertical; if (opts.carouselVisible && opts.carouselVisible > opts.slideCount) opts.carouselVisible = opts.slideCount - 1; var visCount = opts.carouselVisible || opts.slides.length; var slideCSS = { display: vert ? 'block' : 'inline-block', position: 'static' }; // required styles opts.container.css({ position: 'relative', overflow: 'hidden' }); opts.slides.css( slideCSS ); opts._currSlide = opts.currSlide; // wrap slides in a div; this div is what is animated wrap = $('') .prependTo( opts.container ) .css({ margin: 0, padding: 0, top: 0, left: 0, position: 'absolute' }) .append( opts.slides ); opts._carouselWrap = wrap; if ( !vert ) wrap.css('white-space', 'nowrap'); if ( opts.allowWrap !== false ) { // prepend and append extra slides so we don't see any empty space when we // near the end of the carousel. for fluid containers, add even more clones // so there is plenty to fill the screen // @todo: optimzie this based on slide sizes for ( j=0; j < (opts.carouselVisible === undefined ? 2 : 1); j++ ) { for ( i=0; i < opts.slideCount; i++ ) { wrap.append( opts.slides[i].cloneNode(true) ); } i = opts.slideCount; while ( i-- ) { // #160, #209 wrap.prepend( opts.slides[i].cloneNode(true) ); } } wrap.find('.cycle-slide-active').removeClass('cycle-slide-active'); opts.slides.eq(opts.startingSlide).addClass('cycle-slide-active'); } if ( opts.pager && opts.allowWrap === false ) { // hide "extra" pagers pagerCutoffIndex = opts.slideCount - visCount; $( opts.pager ).children().filter( ':gt('+pagerCutoffIndex+')' ).hide(); } opts._nextBoundry = opts.slideCount - opts.carouselVisible; this.prepareDimensions( opts ); }, prepareDimensions: function( opts ) { var dim, offset, pagerCutoffIndex, tmp; var vert = opts.carouselVertical; var visCount = opts.carouselVisible || opts.slides.length; if ( opts.carouselFluid && opts.carouselVisible ) { if ( ! opts._carouselResizeThrottle ) { // fluid container AND fluid slides; slides need to be resized to fit container this.fluidSlides( opts ); } } else if ( opts.carouselVisible && opts.carouselSlideDimension ) { dim = visCount * opts.carouselSlideDimension; opts.container[ vert ? 'height' : 'width' ]( dim ); } else if ( opts.carouselVisible ) { dim = visCount * $(opts.slides[0])[vert ? 'outerHeight' : 'outerWidth'](true); opts.container[ vert ? 'height' : 'width' ]( dim ); } // else { // // fluid; don't size the container // } offset = ( opts.carouselOffset || 0 ); if ( opts.allowWrap !== false ) { if ( opts.carouselSlideDimension ) { offset -= ( (opts.slideCount + opts.currSlide) * opts.carouselSlideDimension ); } else { // calculate offset based on actual slide dimensions tmp = opts._carouselWrap.children(); for (var j=0; j < (opts.slideCount + opts.currSlide); j++) { offset -= $(tmp[j])[vert?'outerHeight':'outerWidth'](true); } } } opts._carouselWrap.css( vert ? 'top' : 'left', offset ); }, fluidSlides: function( opts ) { var timeout; var slide = opts.slides.eq(0); var adjustment = slide.outerWidth() - slide.width(); var prepareDimensions = this.prepareDimensions; // throttle resize event $(window).on( 'resize', resizeThrottle); opts._carouselResizeThrottle = resizeThrottle; onResize(); function resizeThrottle() { clearTimeout( timeout ); timeout = setTimeout( onResize, 20 ); } function onResize() { opts._carouselWrap.stop( false, true ); var slideWidth = opts.container.width() / opts.carouselVisible; slideWidth = Math.ceil( slideWidth - adjustment ); opts._carouselWrap.children().width( slideWidth ); if ( opts._sentinel ) opts._sentinel.width( slideWidth ); prepareDimensions( opts ); } }, // transition API impl transition: function( opts, curr, next, fwd, callback ) { var moveBy, props = {}; var hops = opts.nextSlide - opts.currSlide; var vert = opts.carouselVertical; var speed = opts.speed; // handle all the edge cases for wrapping & non-wrapping if ( opts.allowWrap === false ) { fwd = hops > 0; var currSlide = opts._currSlide; var maxCurr = opts.slideCount - opts.carouselVisible; if ( hops > 0 && opts.nextSlide > maxCurr && currSlide == maxCurr ) { hops = 0; } else if ( hops > 0 && opts.nextSlide > maxCurr ) { hops = opts.nextSlide - currSlide - (opts.nextSlide - maxCurr); } else if ( hops < 0 && opts.currSlide > maxCurr && opts.nextSlide > maxCurr ) { hops = 0; } else if ( hops < 0 && opts.currSlide > maxCurr ) { hops += opts.currSlide - maxCurr; } else currSlide = opts.currSlide; moveBy = this.getScroll( opts, vert, currSlide, hops ); opts.API.opts()._currSlide = opts.nextSlide > maxCurr ? maxCurr : opts.nextSlide; } else { if ( fwd && opts.nextSlide === 0 ) { // moving from last slide to first moveBy = this.getDim( opts, opts.currSlide, vert ); callback = this.genCallback( opts, fwd, vert, callback ); } else if ( !fwd && opts.nextSlide == opts.slideCount - 1 ) { // moving from first slide to last moveBy = this.getDim( opts, opts.currSlide, vert ); callback = this.genCallback( opts, fwd, vert, callback ); } else { moveBy = this.getScroll( opts, vert, opts.currSlide, hops ); } } props[ vert ? 'top' : 'left' ] = fwd ? ( "-=" + moveBy ) : ( "+=" + moveBy ); // throttleSpeed means to scroll slides at a constant rate, rather than // a constant speed if ( opts.throttleSpeed ) speed = (moveBy / $(opts.slides[0])[vert ? 'height' : 'width']() ) * opts.speed; opts._carouselWrap.animate( props, speed, opts.easing, callback ); }, getDim: function( opts, index, vert ) { var slide = $( opts.slides[index] ); return slide[ vert ? 'outerHeight' : 'outerWidth'](true); }, getScroll: function( opts, vert, currSlide, hops ) { var i, moveBy = 0; if (hops > 0) { for (i=currSlide; i < currSlide+hops; i++) moveBy += this.getDim( opts, i, vert); } else { for (i=currSlide; i > currSlide+hops; i--) moveBy += this.getDim( opts, i, vert); } return moveBy; }, genCallback: function( opts, fwd, vert, callback ) { // returns callback fn that resets the left/top wrap position to the "real" slides return function() { var pos = $(opts.slides[opts.nextSlide]).position(); var offset = 0 - pos[vert?'top':'left'] + (opts.carouselOffset || 0); opts._carouselWrap.css( opts.carouselVertical ? 'top' : 'left', offset ); callback(); }; }, // core API override stopTransition: function() { var opts = this.opts(); opts.slides.stop( false, true ); opts._carouselWrap.stop( false, true ); }, // core API supplement onDestroy: function( e ) { var opts = this.opts(); if ( opts._carouselResizeThrottle ) $( window ).off( 'resize', opts._carouselResizeThrottle ); opts.slides.prependTo( opts.container ); opts._carouselWrap.remove(); } }; })(jQuery);