/* jQuery Carousel 0.9.8
Copyright 2010 Thomas Lanciaux and Pierre Bertet.
This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/>
*/
;(function($){

	$.fn.carousel = function(params){
		var params = $.extend({
			direction: "horizontal",
			loop: false,
			dispItems: 1,
			pagination: false,
			paginationPosition: "inside",
			nextBtn: '<input type="button" value="Next" />',
			prevBtn: '<input type="button" value="Previous" />',
			btnsPosition: "inside",
			nextBtnInsert: "insertAfter",
			prevBtnInsert: "insertBefore",
			nextBtnInsertFn: false,
			prevBtnInsertFn: false,
			autoSlide: true,
			autoSlideInterval: 3000,
			delayAutoSlide: false,
			combinedClasses: false,
			effect: "slide",
			slideEasing: "swing",
			animSpeed: 300,
			equalWidths: "true",
			verticalMargin: 0,
			callback: function () {},
			useAddress: false,
			adressIdentifier: "carousel",
			tabLabel: function (tabNum) { return tabNum; },
			showEmptyItems: true,
			ajaxMode:false,
			ajaxUrl:"",
			stopSlideBtn: false,
			stopSlideTextPause: "Pause",
			stopSlideTextPlay: "Play"
		}, params);

		// Buttons position
		if (params.btnsPosition == "outside"){
			params.prevBtnInsert = "insertBefore";
			params.nextBtnInsert = "insertAfter";
		}

		// Slide delay
		params.delayAutoSlide = 0 + params.delayAutoSlide;

		return this.each(function(){

			// Env object
			var env = {
				$elts: {},
				params: params,
				launchOnLoad: []
			};

			// Carousel main container
			env.$elts.carousel = $(this).addClass("js");

			// Carousel content
			env.$elts.content = $(this).children().css({position: "absolute", "top": 0});

			// Content wrapper
			env.$elts.wrap = env.$elts.content.wrap('<div class="carousel-wrap"></div>').parent().css({overflow: "hidden", position: "relative"});

			// env.steps object
			env.steps = {
				first: 0, // First step
				count: env.$elts.content.children().length // Items count
			};

			// Loader
			env.$elts.loader = $('<div class="loader"></div>').css({'position':'absolute'});

			// Last visible step
			env.steps.last = env.steps.count - 1;

			// Pagination
			if (env.params.pagination) {
				initPagination(env);
			}

			// Prev Button
			if ($.isFunction(env.params.prevBtnInsertFn)) {
				env.$elts.prevBtn = env.params.prevBtnInsertFn(env.$elts);
			} else {
				if (params.btnsPosition == "outside"){
					env.$elts.prevBtn = $(params.prevBtn)[params.prevBtnInsert](env.$elts.carousel);
				} else {
					env.$elts.prevBtn = $(params.prevBtn)[params.prevBtnInsert](env.$elts.wrap);
				}
			}

			// Next Button
			if ($.isFunction(env.params.nextBtnInsertFn)) {
				env.$elts.nextBtn = env.params.nextBtnInsertFn(env.$elts);
			} else {
				if (params.btnsPosition == "outside"){
					env.$elts.nextBtn = $(params.nextBtn)[params.nextBtnInsert](env.$elts.carousel);
				} else {
					env.$elts.nextBtn = $(params.nextBtn)[params.nextBtnInsert](env.$elts.wrap);
				}
			}

			// Add buttons classes / data
			env.$elts.nextBtn.addClass("carousel-control next carousel-next");
			env.$elts.prevBtn.addClass("carousel-control previous carousel-previous");

			// Last items to load in ajaxMode var
			env.lastItemsToLoad;

			// Bind events on next / prev buttons
			initButtonsEvents(env);

			// Bind events on focus for keyboard control
			env.$elts.carousel.attr('tabindex',0).add(env.$elts.carousel.children()).bind({
				focus : function(e){
					$(document).bind('keypress', function(e){
						switch (e.keyCode) {
							case 39 : env.$elts.nextBtn.click(); break;
							case 37 : env.$elts.prevBtn.click(); break;
						}
						switch (e.charCode) {
							case 110 : env.$elts.nextBtn.click(); break;
							case 112 : env.$elts.prevBtn.click(); break;
						}
					});
				},
				blur : function(){
					$(document).unbind('keypress');
				}
			});

			// Address plugin
			initAddress(env);

			// On document load...
			$(function(){

				// Launch carousel initialization
				initCarousel(env);

				// Launch function added to "document ready" event
				$.each(env.launchOnLoad, function(i,fn){
					fn();
				});

				// Launch autoslide
				if (env.params.autoSlide){
					initAutoSlide(env);
				}

				// Control Slide Button
				if(params.stopSlideBtn == true){
					env.$elts.stopSlideBtn = $('<button type="button" class="slide-control play">'+params.stopSlideTextPause+'</button>');
					createBtnStopAutoslide(env);
				}

				// Stop/start slide on mousein mouseout
                env.$elts.carousel.hover(
                    function () {
                        stopAutoSlide(env);
                    },
                    function () {
					    initAutoSlide(env);
                    }
                );

			});

		});

	};

	// Init carousel dimensions
	function initCarousel(env){
		//Set max Height with the highest element
		var $items = env.$elts.content.children();
		var $maxHeight = 0;

		$items.each(function () {
			$item = $(this);
			$itemHeight = $item.outerHeight();
			if ($itemHeight > $maxHeight) {
				$maxHeight = $itemHeight;
			}
		});
		if (env.params.verticalMargin > 0) {
			$maxHeight = $maxHeight + env.params.verticalMargin;
		}

		$items.height($maxHeight);
		// First item
		var $firstItem = env.$elts.content.children(":first");

		// Width 1/1 : Get default item width
		env.itemWidth = $firstItem.outerWidth();

		// Width 2/3 : Define content width
		if (env.params.direction == "vertical"){
			env.contentWidth = env.itemWidth;

		} else {

			if (env.params.equalWidths) {
				env.contentWidth = env.itemWidth * env.steps.count;

			} else {
				env.contentWidth = (function(){
						var totalWidth = 0;

						env.$elts.content.children().each(function(){
							totalWidth += $(this).outerWidth();
						});

						return totalWidth;
					})();
			}
		}

		// Width 3/3 : Set content width to container
		env.$elts.content.width(env.contentWidth);

		// Height 1/2 : Get default item height
		env.itemHeight = $maxHeight;

		// Height 2/2 : Set content height to container
		if (env.params.direction == "vertical") {
			env.$elts.content.css({
				height: env.itemHeight * env.steps.count + "px"
			});
			env.$elts.content.parent().css({
				height: env.itemHeight * env.params.dispItems + "px"
			});
		} else {
			env.$elts.content.parent().css({
				height: env.itemHeight + "px"
			});
		}

		// Update Next / Prev buttons state
		updateButtonsState(env);
	}

	// Next / Prev buttons events only
	function initButtonsEvents(env){

		env.$elts.nextBtn.add(env.$elts.prevBtn)

			.bind("enable", function(){

				var $this = $(this)
					.unbind("click")
					.bind("click", function(){
						// Ajax init
						if(env.params.ajaxMode && $this.is('.next') && getActivePageIndex(env) == (getPageTotal(env)-1) && !env.lastItemsToLoad) {
							// Append content in ajax
							ajaxLoad(env);
							// Go to next page of the carousel
							env.$elts.content.ajaxSuccess(function() {

							});
						}else{
							goToStep( env, getRelativeStep(env, ($this.is(".next")? "next" : "prev" )) );

							if(env.params.stopSlideBtn == true){
								env.$elts.stopSlideBtn.trigger('pause');
							} else {
								stopAutoSlide(env);
							}
						}
					})
					.removeClass("disabled").removeAttr('disabled');

				// Combined classes (IE6 compatibility)
				if (env.params.combinedClasses) {
					$this.removeClass("next-disabled previous-disabled").removeAttr("disabled");
				}
			})
			.bind("disable", function(){

				var $this = $(this).unbind("click").addClass("disabled").attr("disabled","disabled");

				// Combined classes (IE6 compatibility)
				if (env.params.combinedClasses) {

					if ($this.is(".next")) {
						$this.addClass("next-disabled");

					} else if ($this.is(".previous")) {
						$this.addClass("previous-disabled");

					}
				}
			})
			.hover(function(){
				$(this).toggleClass("hover");
			});
	};

	// Pagination
	function initPagination(env) {
			env.$elts.pagination = $('<div class="center-wrap"><div class="carousel-pagination"><p></p></div></div>')[((env.params.paginationPosition == "outside") ? "insertAfter" : "appendTo")](env.$elts.carousel).find("p");
			env.$elts.paginationBtns = $([]);

			env.$elts.content.find("li").each(function (i) {
				if (i % env.params.dispItems == 0) {
					addPage(env, i);
				}
			});
    };

	// Add a page in pagintion (@ the end)
	function addPage(env, firststep) {
		if(env.params.pagination){
			env.$elts.paginationBtns = env.$elts.paginationBtns.add($('<a role="button"><span>' + env.params.tabLabel(env.$elts.paginationBtns.length + 1) + '</span></a>').data("firstStep", firststep))
			.appendTo(env.$elts.pagination);
			env.$elts.paginationBtns.slice(0, 1).addClass("active");
			env.$elts.paginationBtns.click(function (e) {
				goToStep(env, $(this).data("firstStep"));
				if(env.params.stopSlideBtn == true){
					env.$elts.stopSlideBtn.trigger('pause');
				} else {
					stopAutoSlide(env);
				}
			});
		}
	}

	// Address plugin
	function initAddress(env) {

		if (env.params.useAddress && $.isFunction($.fn.address)) {

			$.address
				.init(function(e) {
					var pathNames = $.address.pathNames();
					if (pathNames[0] === env.params.adressIdentifier && !!pathNames[1]) {
						goToStep(env, pathNames[1]-1);
					} else {
						$.address.value('/'+ env.params.adressIdentifier +'/1');
					}
				})
				.change(function(e) {
					var pathNames = $.address.pathNames();
					if (pathNames[0] === env.params.adressIdentifier && !!pathNames[1]) {
						goToStep(env, pathNames[1]-1);
					}
				});
		} else {
			env.params.useAddress = false;
		}
	};

	function goToStep(env, step) {

		// Callback
		env.params.callback(step);

		// Launch animation
		transition(env, step);

		// Update first step
		env.steps.first = step;

		// Update buttons status
		updateButtonsState(env);

		// Update address (jQuery Address plugin)
		if ( env.params.useAddress ) {
			$.address.value('/'+ env.params.adressIdentifier +'/' + (step + 1));
		}

	};

	// Get next/prev step, useful for autoSlide
	function getRelativeStep(env, position) {
		if (position == "prev") {
			if (!env.params.showEmptyItems) {
				if (env.steps.first == 0) {
					return ((env.params.loop) ? (env.steps.count - env.params.dispItems) : false);
				} else {
					return Math.max(0, env.steps.first - env.params.dispItems);
				}
			} else {
				if ((env.steps.first - env.params.dispItems) >= 0) {
					return env.steps.first - env.params.dispItems;
				} else {
					return ((env.params.loop) ? (env.steps.count - env.params.dispItems) : false);
				}
			}
		} else if (position == "next") {
			if ((env.steps.first + env.params.dispItems) < env.steps.count) {
				if (!env.params.showEmptyItems) {
					return Math.min(env.steps.first + env.params.dispItems, env.steps.count - env.params.dispItems);
				} else {
					return env.steps.first + env.params.dispItems;
				}
			} else {
				return ((env.params.loop) ? 0 : false);
			}
		}
	};

	// Animation
	function transition(env, step) {

		// Effect
		switch (env.params.effect){

			// No effect
			case "no":
				if (env.params.direction == "vertical"){
					env.$elts.content.css("top", -(env.itemHeight * step) + "px");
				} else {
					env.$elts.content.css("left", -(env.itemWidth * step) + "px");
				}
				break;

			// Fade effect
			case "fade":
				if (env.params.direction == "vertical"){
					env.$elts.content.hide().css("top", -(env.itemHeight * step) + "px").fadeIn(env.params.animSpeed);
				} else {
					env.$elts.content.hide().css("left", -(env.itemWidth * step) + "px").fadeIn(env.params.animSpeed);
				}
				break;

			// Slide effect
			default:
				if (env.params.direction == "vertical"){
					env.$elts.content.stop().animate({
						top : -(env.itemHeight * step) + "px"
					}, env.params.animSpeed, env.params.slideEasing);
				} else {
					env.$elts.content.stop().animate({
						left : -(env.itemWidth * step) + "px"
					}, env.params.animSpeed, env.params.slideEasing);
				}
				break;
		}

	};

	// Update all buttons state : disabled or not
	function updateButtonsState(env){

		if (getRelativeStep(env, "prev") !== false) {
			env.$elts.prevBtn.trigger("enable");

		} else {
			env.$elts.prevBtn.trigger("disable");
		}

		if (getRelativeStep(env, "next") !== false) {
			env.$elts.nextBtn.trigger("enable");

		} else {
			env.$elts.nextBtn.trigger("disable");
		}

		if (env.params.pagination){
			env.$elts.paginationBtns.removeClass("active")
			.filter(function(){
				return ($(this).data("firstStep") == env.steps.first)
			})
			.addClass("active");
		}
	};

	// Launch Autoslide
	function initAutoSlide(env) {
		env.delayAutoSlide = window.setTimeout(function(){
			env.autoSlideInterval = window.setInterval(function(){
				goToStep( env, getRelativeStep(env, "next") );
			}, env.params.autoSlideInterval);
		}, env.params.delayAutoSlide);
	};

	// Stop autoslide
	function stopAutoSlide(env) {
		window.clearTimeout(env.delayAutoSlide);
		window.clearInterval(env.autoSlideInterval);
		env.params.delayAutoSlide = 0;
	};

	// Create button "stop autoslide"
	function createBtnStopAutoslide(env){
		var jButton = env.$elts.stopSlideBtn;

		jButton.bind({
			'play' : function(){
				initAutoSlide(env);
				jButton.removeClass('pause').addClass('play').html(env.params.stopSlideTextPause);
			},
			'pause' : function(){
				stopAutoSlide(env);
				jButton.removeClass('play').addClass('pause').html(env.params.stopSlideTextPlay);
			}
		});

		jButton.click(function(e){
			if(jButton.is('.play')){
				jButton.trigger('pause');
			} else if (jButton.is('.pause')){
				jButton.trigger('play');
			}
		});

		jButton.prependTo(env.$elts.wrap);
	};

	// Get total number of page in the carousel
	function getPageTotal(env) {
		return env.$elts.pagination.children().length;
	};

	function getActivePageIndex(env){
		return env.steps.first/env.params.dispItems;
	}

	// Load next page via Ajax
	function ajaxLoad(env) {
		// insert loader
		env.$elts.carousel.prepend(env.$elts.loader);

		// ajax call
		$.ajax({
			url: env.params.ajaxUrl,
			dataType: 'json',
			success: function(data) {
				// set if the last item of the carousel have been loaded and add items to the carousel
				env.lastItemsToLoad = data.bLastItemsToLoad;
				$(env.$elts.content).append(data.shtml);

				// reinit count (number of items have changed after ajax call)
				env.steps = {
					first: env.steps.first + env.params.dispItems,
					count: env.$elts.content.children().length
				};
				env.steps.last = env.steps.count - 1;

				// rewrite carousel dimensions
				initCarousel(env);
				// rewrite/append pagination
				addPage(env,env.steps.first);

				// slide to next page
				goToStep( env, env.steps.first );
				if(env.params.stopSlideBtn == true){
					env.$elts.stopSlideBtn.trigger('pause');
				} else {
					stopAutoSlide(env);
				}

				// remove loader
				env.$elts.loader.remove();
			}
		});
	}

})(jQuery);

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