// page init
jQuery(function() {
	initCycleCarousel();
	initBackgroundResize();
	// menu
	menu.init();
	// scroller
	scroller.init();
});

// cycle scroll gallery init
function initCycleCarousel() {
	jQuery('.cycle-gallery').scrollAbsoluteGallery({
		mask: '.mask',
		slider: '.slideset',
		slides: '.slide',
		btnPrev: 'a.btn-prev',
		btnNext: 'a.btn-next',
		pagerLinks: '.pagination li',
		stretchSlideToMask: true,
		pauseOnHover: true,
		maskAutoSize: true,
		autoRotation: false,
		switchTime: 3000,
		animSpeed: 500
	});
}

// stretch background to fill blocks
function initBackgroundResize() {
	jQuery('.visual-area').each(function() {
		ImageStretcher.add({
			container: this,
			image: 'img.bg-stretch'
		});
	});
}

var body = $('body'),
	// menu for mobile view
	menu = {
		config : {
			trigger : jQuery('.nav-opener'),
			open : false
		},
		init : function() {
			this.config.trigger.click(this.toggle.bind(this));
		},
		toggle : function() {
			if(this.config.open) {
				body.removeClass('nav-active');
			}
			else {
				body.addClass('nav-active');
			}
			this.config.open = !this.config.open;
		}
	};

// move some elements on scroll
var scroller = {
	config : {
		docElem : window.document.documentElement,
		// The viewportFactor defines how much of the appearing item has to be visible in order to trigger the animation
		// if we'd use a value of 0, this would mean that it would add the animation class as soon as the item is in the viewport. 
		// If we were to use the value of 1, the animation would only be triggered when we see all of the item in the viewport (100% of it)
		viewportFactor : 0,
		elems : '.slide-holder'
	},
	getViewportH : function() {
		var client = this.config.docElem['clientHeight'],
			inner = window['innerHeight'];
		
		if( client < inner )
			return inner;
		else
			return client;
	},
	scrollY : function() {
		return window.pageYOffset || this.config.docElem.scrollTop;
	},
	getOffset : function(el) {
		var offsetTop = 0, offsetLeft = 0;
		do {
			if ( !isNaN( el.offsetTop ) ) {
				offsetTop += el.offsetTop;
			}
			if ( !isNaN( el.offsetLeft ) ) {
				offsetLeft += el.offsetLeft;
			}
		} while( el = el.offsetParent )

		return {
			top : offsetTop,
			left : offsetLeft
		}
	},
	inViewport : function(el, h) {
		var elH = el.offsetHeight,
			scrolled = this.scrollY(),
			viewed = scrolled + this.getViewportH(),
			elTop = this.getOffset(el).top,
			elBottom = elTop + elH,
			// if 0, the element is considered in the viewport as soon as it enters.
			// if 1, the element is considered in the viewport only when it's fully inside
			// value in percentage (1 >= h >= 0)
			h = h || 0;

		return (elTop + elH * h) <= viewed && (elBottom) >= scrolled;
	},
	init : function() {
		this.sections = jQuery(this.config.elems);
		this.didScroll = false;

		var self = this,
			scrollHandler = function() {
				if( !self.didScroll ) {
					self.didScroll = true;
					setTimeout( function() { self.scrollPage(); }, 60 );
				}
			},
			resizeHandler = function() {
				function delayed() {
					self.scrollPage();
					self.resizeTimeout = null;
				}
				if ( self.resizeTimeout ) {
					clearTimeout( self.resizeTimeout );
				}
				self.resizeTimeout = setTimeout( delayed, 200 );
			};

		window.addEventListener( 'scroll', scrollHandler, false );
		window.addEventListener( 'resize', resizeHandler, false );
	},
	scrollPage : function() {
		var self = this;

		this.sections.each(function() {
			if( self.inViewport( this, self.config.viewportFactor ) ) {
				jQuery(this).addClass('scroll-effect-animate');
			}
			else {
				// this add class init if it doesn't have it. This will ensure that the items initially in the viewport will also animate on scroll
				jQuery(this).addClass('scroll-effect-init');
				jQuery(this).removeClass('scroll-effect-animate');
			}
		});
		this.didScroll = false;
	}
}

/*
 * jQuery Cycle Carousel plugin
 */
;(function($){
	function ScrollAbsoluteGallery(options) {
		this.options = $.extend({
			activeClass: 'active',
			mask: 'div.slides-mask',
			slider: '>ul',
			slides: '>li',
			btnPrev: '.btn-prev',
			btnNext: '.btn-next',
			pagerLinks: 'ul.pager > li',
			generatePagination: false,
			pagerList: '<ul>',
			pagerListItem: '<li><a href="#"></a></li>',
			pagerListItemText: 'a',
			galleryReadyClass: 'gallery-js-ready',
			currentNumber: 'span.current-num',
			totalNumber: 'span.total-num',
			maskAutoSize: false,
			autoRotation: false,
			pauseOnHover: false,
			stretchSlideToMask: false,
			switchTime: 3000,
			animSpeed: 500,
			handleTouch: true,
			swipeThreshold: 15,
			vertical: false
		}, options);
		this.init();
	}
	ScrollAbsoluteGallery.prototype = {
		init: function() {
			if(this.options.holder) {
				this.findElements();
				this.attachEvents();
				this.makeCallback('onInit', this);
			}
		},
		findElements: function() {
			// find structure elements
			this.holder = $(this.options.holder).addClass(this.options.galleryReadyClass);
			this.mask = this.holder.find(this.options.mask);
			this.slider = this.mask.find(this.options.slider);
			this.slides = this.slider.find(this.options.slides);
			this.btnPrev = this.holder.find(this.options.btnPrev);
			this.btnNext = this.holder.find(this.options.btnNext);

			// slide count display
			this.currentNumber = this.holder.find(this.options.currentNumber);
			this.totalNumber = this.holder.find(this.options.totalNumber);

			// create gallery pagination
			if(typeof this.options.generatePagination === 'string') {
				this.pagerLinks = this.buildPagination();
			} else {
				this.pagerLinks = this.holder.find(this.options.pagerLinks);
			}

			// define index variables
			this.sizeProperty = this.options.vertical ? 'height' : 'width';
			this.positionProperty = this.options.vertical ? 'top' : 'left';
			this.animProperty = this.options.vertical ? 'marginTop' : 'marginLeft';

			this.slideSize = this.slides[this.sizeProperty]();
			this.currentIndex = 0;
			this.prevIndex = 0;

			// reposition elements
			this.options.maskAutoSize = this.options.vertical ? false : this.options.maskAutoSize;
			if(this.options.vertical) {
				this.mask.css({
					height: this.slides.innerHeight()
				});
			}
			if(this.options.maskAutoSize){
				this.mask.css({
					height: this.slider.height()
				});
			}
			this.slider.css({
				position: 'relative',
				height: this.options.vertical ? this.slideSize * this.slides.length : '100%'
			});
			this.slides.css({
				position: 'absolute'
			}).css(this.positionProperty, -9999).eq(this.currentIndex).css(this.positionProperty, 0);
			this.refreshState();
		},
		buildPagination: function() {
			var pagerLinks = $();
			if(!this.pagerHolder) {
				this.pagerHolder = this.holder.find(this.options.generatePagination);
			}
			if(this.pagerHolder.length) {
				this.pagerHolder.empty();
				this.pagerList = $(this.options.pagerList).appendTo(this.pagerHolder);
				for(var i = 0; i < this.slides.length; i++) {
					$(this.options.pagerListItem).appendTo(this.pagerList).find(this.options.pagerListItemText).text(i+1);
				}
				pagerLinks = this.pagerList.children();
			}
			return pagerLinks;
		},
		attachEvents: function() {
			// attach handlers
			var self = this;
			if(this.btnPrev.length) {
				this.btnPrevHandler = function(e) {
					e.preventDefault();
					self.prevSlide();
				};
				this.btnPrev.click(this.btnPrevHandler);
			}
			if(this.btnNext.length) {
				this.btnNextHandler = function(e) {
					e.preventDefault();
					self.nextSlide();
				};
				this.btnNext.click(this.btnNextHandler);
			}
			if(this.pagerLinks.length) {
				this.pagerLinksHandler = function(e) {
					e.preventDefault();
					self.numSlide(self.pagerLinks.index(e.currentTarget));
				};
				this.pagerLinks.click(this.pagerLinksHandler);
			}

			// handle autorotation pause on hover
			if(this.options.pauseOnHover) {
				this.hoverHandler = function() {
					clearTimeout(self.timer);
				};
				this.leaveHandler = function() {
					self.autoRotate();
				};
				this.holder.bind({mouseenter: this.hoverHandler, mouseleave: this.leaveHandler});
			}

			// handle holder and slides dimensions
			this.resizeHandler = function() {
				if(!self.animating) {
					if(self.options.stretchSlideToMask) {
						self.resizeSlides();
					}
					self.resizeHolder();
					self.setSlidesPosition(self.currentIndex);
				}
			};
			$(window).bind('load resize orientationchange', this.resizeHandler);
			if(self.options.stretchSlideToMask) {
				self.resizeSlides();
			}

			// handle swipe on mobile devices
			if(this.options.handleTouch && window.Hammer && this.mask.length && this.slides.length > 1 && isTouchDevice) {
				this.swipeHandler = new Hammer.Manager(this.mask[0]);
				this.swipeHandler.add(new Hammer.Pan({
					direction: self.options.vertical ? Hammer.DIRECTION_VERTICAL : Hammer.DIRECTION_HORIZONTAL,
					threshold: self.options.swipeThreshold
				}));

				this.swipeHandler.on('panstart', function() {
					if(self.animating) {
						self.swipeHandler.stop();
					} else {
						clearTimeout(self.timer);
					}
				}).on('panmove', function(e) {
					self.swipeOffset = -self.slideSize + e[self.options.vertical ? 'deltaY' : 'deltaX'];
					self.slider.css(self.animProperty, self.swipeOffset);
					clearTimeout(self.timer);
				}).on('panend', function(e) {
					if(e.distance > self.options.swipeThreshold) {
						if(e.offsetDirection === Hammer.DIRECTION_RIGHT || e.offsetDirection === Hammer.DIRECTION_DOWN) {
							self.nextSlide();
						} else {
							self.prevSlide();
						}
					} else {
						var tmpObj = {};
						tmpObj[self.animProperty] = -self.slideSize;
						self.slider.animate(tmpObj, {duration: self.options.animSpeed});
						self.autoRotate();
					}
					self.swipeOffset = 0;
				});
			}

			// start autorotation
			this.autoRotate();
			this.resizeHolder();
			this.setSlidesPosition(this.currentIndex);
		},
		resizeSlides: function() {
			this.slideSize = this.mask[this.options.vertical ? 'height' : 'width']();
			this.slides.css(this.sizeProperty, this.slideSize);
		},
		resizeHolder: function() {
			if(this.options.maskAutoSize) {
				this.mask.css({
					height: this.slides.eq(this.currentIndex).outerHeight(true)
				});
			}
		},
		prevSlide: function() {
			if(!this.animating && this.slides.length > 1) {
				this.direction = -1;
				this.prevIndex = this.currentIndex;
				if(this.currentIndex > 0) this.currentIndex--;
				else this.currentIndex = this.slides.length - 1;
				this.switchSlide();
			}
		},
		nextSlide: function(fromAutoRotation) {
			if(!this.animating && this.slides.length > 1) {
				this.direction = 1;
				this.prevIndex = this.currentIndex;
				if(this.currentIndex < this.slides.length - 1) this.currentIndex++;
				else this.currentIndex = 0;
				this.switchSlide();
			}
		},
		numSlide: function(c) {
			if(!this.animating && this.currentIndex !== c && this.slides.length > 1) {
				this.direction = c > this.currentIndex ? 1 : -1;
				this.prevIndex = this.currentIndex;
				this.currentIndex = c;
				this.switchSlide();
			}
		},
		preparePosition: function() {
			// prepare slides position before animation
			this.setSlidesPosition(this.prevIndex, this.direction < 0 ? this.currentIndex : null, this.direction > 0 ? this.currentIndex : null, this.direction);
		},
		setSlidesPosition: function(index, slideLeft, slideRight, direction) {
			// reposition holder and nearest slides
			if(this.slides.length > 1) {
				var prevIndex = (typeof slideLeft === 'number' ? slideLeft : index > 0 ? index - 1 : this.slides.length - 1);
				var nextIndex = (typeof slideRight === 'number' ? slideRight : index < this.slides.length - 1 ? index + 1 : 0);

				this.slider.css(this.animProperty, this.swipeOffset ? this.swipeOffset : -this.slideSize);
				this.slides.css(this.positionProperty, -9999).eq(index).css(this.positionProperty, this.slideSize);
				if(prevIndex === nextIndex && typeof direction === 'number') {
					var calcOffset = direction > 0 ? this.slideSize*2 : 0;
					this.slides.eq(nextIndex).css(this.positionProperty, calcOffset);
				} else {
					this.slides.eq(prevIndex).css(this.positionProperty, 0);
					this.slides.eq(nextIndex).css(this.positionProperty, this.slideSize*2);
				}
			}
		},
		switchSlide: function() {
			// prepare positions and calculate offset
			var self = this;
			var oldSlide = this.slides.eq(this.prevIndex);
			var newSlide = this.slides.eq(this.currentIndex);
			this.animating = true;

			// resize mask to fit slide
			if(this.options.maskAutoSize) {
				this.mask.animate({
					height: newSlide.outerHeight(true)
				}, {
					duration: this.options.animSpeed
				});
			}

			// start animation
			var animProps = {};
			animProps[this.animProperty] = this.direction > 0 ? -this.slideSize*2 : 0;
			this.preparePosition();
			this.slider.animate(animProps,{duration:this.options.animSpeed, complete:function() {
				self.setSlidesPosition(self.currentIndex);

				// start autorotation
				self.animating = false;
				self.autoRotate();

				// onchange callback
				self.makeCallback('onChange', self);
			}});

			// refresh classes
			this.refreshState();

			// onchange callback
			this.makeCallback('onBeforeChange', this);
		},
		refreshState: function(initial) {
			// slide change function
			this.slides.removeClass(this.options.activeClass).eq(this.currentIndex).addClass(this.options.activeClass);
			this.pagerLinks.removeClass(this.options.activeClass).eq(this.currentIndex).addClass(this.options.activeClass);

			// display current slide number
			this.currentNumber.html(this.currentIndex + 1);
			this.totalNumber.html(this.slides.length);

			// add class if not enough slides
			this.holder.toggleClass('not-enough-slides', this.slides.length === 1);
		},
		autoRotate: function() {
			var self = this;
			clearTimeout(this.timer);
			if(this.options.autoRotation) {
				this.timer = setTimeout(function() {
					self.nextSlide();
				}, this.options.switchTime);
			}
		},
		makeCallback: function(name) {
			if(typeof this.options[name] === 'function') {
				var args = Array.prototype.slice.call(arguments);
				args.shift();
				this.options[name].apply(this, args);
			}
		},
		destroy: function() {
			// destroy handler
			this.btnPrev.unbind('click', this.btnPrevHandler);
			this.btnNext.unbind('click', this.btnNextHandler);
			this.pagerLinks.unbind('click', this.pagerLinksHandler);
			this.holder.unbind('mouseenter', this.hoverHandler);
			this.holder.unbind('mouseleave', this.leaveHandler);
			$(window).unbind('load resize orientationchange', this.resizeHandler);
			clearTimeout(this.timer);

			// destroy swipe handler
			if(this.swipeHandler) {
				this.swipeHandler.destroy();
			}

			// remove inline styles, classes and pagination
			this.holder.removeClass(this.options.galleryReadyClass);
			this.slider.add(this.slides).removeAttr('style');
			if(typeof this.options.generatePagination === 'string') {
				this.pagerHolder.empty();
			}
		}
	};

	// detect device type
	var isTouchDevice = /Windows Phone/.test(navigator.userAgent) || ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch;

	// jquery plugin
	$.fn.scrollAbsoluteGallery = function(opt){
		return this.each(function(){
			$(this).data('ScrollAbsoluteGallery', new ScrollAbsoluteGallery($.extend(opt,{holder:this})));
		});
	};
}(jQuery));

/*
 * Image Stretch module
 */
var ImageStretcher = {
	getDimensions: function(data) {
		// calculate element coords to fit in mask
		var ratio = data.imageRatio || (data.imageWidth / data.imageHeight),
			slideWidth = data.maskWidth,
			slideHeight = slideWidth / ratio;

		if(slideHeight < data.maskHeight) {
			slideHeight = data.maskHeight;
			slideWidth = slideHeight * ratio;
		}
		return {
			width: slideWidth,
			height: slideHeight,
			top: (data.maskHeight - slideHeight) / 2,
			left: (data.maskWidth - slideWidth) / 2
		};
	},
	getRatio: function(image) {
		if(image.prop('naturalWidth')) {
			return image.prop('naturalWidth') / image.prop('naturalHeight');
		} else {
			var img = new Image();
			img.src = image.prop('src');
			return img.width / img.height;
		}
	},
	imageLoaded: function(image, callback) {
		var self = this;
		var loadHandler = function() {
			callback.call(self);
		};
		if(image.prop('complete')) {
			loadHandler();
		} else {
			image.one('load', loadHandler);
		}
	},
	resizeHandler: function() {
		var self = this;
		jQuery.each(this.imgList, function(index, item) {
			if(item.image.prop('complete')) {
				self.resizeImage(item.image, item.container);
			}
		});
	},
	resizeImage: function(image, container) {
		this.imageLoaded(image, function() {
			var styles = this.getDimensions({
				imageRatio: this.getRatio(image),
				maskWidth: container.width(),
				maskHeight: container.height()
			});
			image.css({
				width: styles.width,
				height: styles.height,
				marginTop: styles.top,
				marginLeft: styles.left
			});
		});
	},
	add: function(options) {
		var container = jQuery(options.container ? options.container : window),
			image = typeof options.image === 'string' ? container.find(options.image) : jQuery(options.image);

		// resize image
		this.resizeImage(image, container);

		// add resize handler once if needed
		if(!this.win) {
			this.resizeHandler = jQuery.proxy(this.resizeHandler, this);
			this.imgList = [];
			this.win = jQuery(window);
			this.win.on('resize orientationchange', this.resizeHandler);
		}

		// store item in collection
		this.imgList.push({
			container: container,
			image: image
		});
	}
};

/*! Hammer.JS - v2.0.4 - 2014-09-28
 * http://hammerjs.github.io/
 *
 * Copyright (c) 2014 Jorik Tangelder;
 * Licensed under the MIT license */
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