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/* Edited by Pixelwars - 10.02.2015  */
/**
 * jquery.gridrotator.js v1.1.0
 * http://www.codrops.com
 *
 * Licensed under the MIT license.
 * http://www.opensource.org/licenses/mit-license.php
 * 
 * Copyright 2012, Codrops
 * http://www.codrops.com
 */
;( function( $, window, undefined ) {
	
	'use strict';

/*
	* debouncedresize: special jQuery event that happens once after a window resize
	*
	* latest version and complete README available on Github:
	* https://github.com/louisremi/jquery-smartresize/blob/master/jquery.debouncedresize.js
	*
	* Copyright 2011 @louis_remi
	* Licensed under the MIT license.
	*/
	var $event = $.event,
	$special,
	resizeTimeout;

$special = $event.special.debouncedresize = {
		setup: function() {
			$( this ).on( "resize", $special.handler );
		},
		teardown: function() {
			$( this ).off( "resize", $special.handler );
		},
		handler: function( event, execAsap ) {
			// Save the context
			var context = this,
				args = arguments,
				dispatch = function() {
					// set correct event type
					event.type = "debouncedresize";
					$event.dispatch.apply( context, args );
				};

if ( resizeTimeout ) {
				clearTimeout( resizeTimeout );
			}

execAsap ?
				dispatch() :
				resizeTimeout = setTimeout( dispatch, $special.threshold );
		},
		threshold: 100
	};

// http://www.hardcode.nl/subcategory_1/article_317-array-shuffle-function
	Array.prototype.shuffle = function() {
		var i=this.length,p,t;
		while (i--) {
			p = Math.floor(Math.random()*i);
			t = this[i];
			this[i]=this[p];
			this[p]=t;
		}
		return this;
	};

// HTML5 PageVisibility API
	// http://www.html5rocks.com/en/tutorials/pagevisibility/intro/
	// by Joe Marini (@joemarini)
	function getHiddenProp(){
		var prefixes = ['webkit','moz','ms','o'];

// if 'hidden' is natively supported just return it
		if ('hidden' in document) return 'hidden';

// otherwise loop over all the known prefixes until we find one
		for (var i = 0; i < prefixes.length; i++){
			if ((prefixes[i] + 'Hidden') in document) 
				return prefixes[i] + 'Hidden';
		}

// otherwise it's not supported
		return null;
	}
	function isHidden() {
		var prop = getHiddenProp();
		if (!prop) return false;

return document[prop];
	}

function isEmpty( obj ) {
		return Object.keys(obj).length === 0;
	}

// global
	var $window = $( window ),
		Modernizr = window.Modernizr;

$.GridRotator = function( options, element ) {
		
		this.$el = $( element );
		if( Modernizr.backgroundsize ) {

var self = this;
			this.$el.addClass( 'ri-grid-loading' );
			this._init( options );

}
		
	};

// the options
	$.GridRotator.defaults = {
		// number of rows
		rows : 4,
		// number of columns 
		columns : 10,
		w1200 : { rows : 3, columns : 8 },
		w1024 : { rows : 3, columns : 8 },
		w768 : {rows : 3,columns : 7 },
		w480 : {rows : 3,columns : 5 },
		w320 : {rows : 2,columns : 4 },
		w240 : {rows : 2,columns : 3 },
		// step: number of items that are replaced at the same time
		// random || [some number]
		// note: for performance issues, the number "can't" be > options.maxStep
		step : 'random',
		// change it as you wish..
		maxStep : 3,
		// prevent user to click the items
		preventClick : true,
		// animation type
		// showHide || fadeInOut || 
		// slideLeft || slideRight || slideTop || slideBottom || 
		// rotateBottom || rotateLeft || rotateRight || rotateTop || 
		// scale ||
		// rotate3d ||
		// rotateLeftScale || rotateRightScale || rotateTopScale || rotateBottomScale || 
		// random
		animType : 'random',
		// animation speed
		animSpeed : 800,
		// animation easings
		animEasingOut : 'linear',
		animEasingIn: 'linear',
		// the item(s) will be replaced every 3 seconds
		// note: for performance issues, the time "can't" be < 300 ms
		interval : 3000,
		// if false the animations will not start
		// use false if onhover is true for example
		slideshow : true,
		// if true the items will switch when hovered
		onhover : false,
		// ids of elements that shouldn't change
		nochange : []
	};

$.GridRotator.prototype = {

_init : function( options ) {
			
			// options
			this.options = $.extend( true, {}, $.GridRotator.defaults, options );
			// cache some elements + variables
			this._config();

},
		_config : function() {

var self = this,
				transEndEventNames = {
					'WebkitTransition' : 'webkitTransitionEnd',
					'MozTransition' : 'transitionend',
					'OTransition' : 'oTransitionEnd',
					'msTransition' : 'MSTransitionEnd',
					'transition' : 'transitionend'
				};

// support CSS transitions and 3d transforms
			this.supportTransitions = Modernizr.csstransitions;
			this.supportTransforms3D = Modernizr.csstransforms3d;

this.transEndEventName = transEndEventNames[ Modernizr.prefixed( 'transition' ) ] + '.gridrotator';

// all animation types for the random option
			this.animTypes = this.supportTransforms3D ? [
				'fadeInOut',
				'slideLeft', 
				'slideRight', 
				'slideTop', 
				'slideBottom', 
				'rotateLeft', 
				'rotateRight', 
				'rotateTop', 
				'rotateBottom', 
				'scale', 
				'rotate3d', 
				'rotateLeftScale', 
				'rotateRightScale', 
				'rotateTopScale', 
				'rotateBottomScale' ] :
				[ 'fadeInOut', 'slideLeft', 'slideRight', 'slideTop', 'slideBottom' ];

this.animType = this.options.animType;

if( this.animType !== 'random' && !this.supportTransforms3D && $.inArray( this.animType, this.animTypes ) === -1 && this.animType !== 'showHide' ) {

// fallback to 'fadeInOut' if user sets a type which is not supported
				this.animType = 'fadeInOut';

}

this.animTypesTotal	= this.animTypes.length;

// the <ul> where the items are placed
			this.$list = this.$el.children( 'ul' );
			// remove images and add background-image to anchors
			// preload the images before
			var loaded = 0,
				$imgs = this.$list.find( 'img' ),
				count = $imgs.length;

$imgs.each( function() {

var $img = $( this ), src = $img.attr( 'src' );

$( '<img/>' ).load( function() {

++loaded;
					$img.parent().css( 'background-image', 'url(' + src + ')' );

if( loaded === count ) {

$imgs.remove();
						self.$el.removeClass( 'ri-grid-loading' );
						// the items
						self.$items = self.$list.children( 'li' );
						// make a copy of the items
						self.$itemsCache = self.$items.clone();
						// total number of items
						self.itemsTotal = self.$items.length;
						// the items that will be out of the grid
						// actually the item's child (anchor element)
						self.outItems= [];
						self._layout( function() {
							self._initEvents();
						} );
						// replace [options.step] items after [options.interval] time
						// the items that go out are randomly chosen, while the ones that get in
						// follow a "First In First Out" logic
						self._start();

}

} ).attr( 'src', src )
				 
			} );

},
		_layout : function( callback ) {

var self = this;

// sets the grid dimentions based on the container's width
			this._setGridDim();

// reset
			this.$list.empty();
			this.$items = this.$itemsCache.clone().appendTo( this.$list );
			
			var $outItems = this.$items.filter( ':gt(' + ( this.showTotal - 1 ) + ')' ),
				$outAItems = $outItems.children( 'a' );

this.outItems.length = 0;

$outAItems.each( function( i ) {
				self.outItems.push( $( this ) );
			} );

$outItems.remove();
			
			this._setContainerWidth();
			
			// pixelwars edit
			// moved codes to _setContainerWidth	 : function() { }
			// pixelwars edit
		
			if( this.options.preventClick ) {

this.$items.children().css( 'cursor', 'default' ).on( 'click.gridrotator', false );

}

if( callback ) {
				callback.call();
			}

},
		// set the grid rows and columns
		_setGridDim	 : function() {

// container's width
			var c_w = this.$el.width();

// we will choose the number of rows/columns according to the container's width and the values set in the plugin options 
			switch( true ) {
				case ( c_w < 240 ) : this.rows = this.options.w240.rows; this.columns = this.options.w240.columns; break;
				case ( c_w < 320 ) : this.rows = this.options.w320.rows; this.columns = this.options.w320.columns; break;
				case ( c_w < 480 ) : this.rows = this.options.w480.rows; this.columns = this.options.w480.columns; break;
				case ( c_w < 768 ) : this.rows = this.options.w768.rows; this.columns = this.options.w768.columns; break;
				case ( c_w < 1024 ) : this.rows = this.options.w1024.rows; this.columns = this.options.w1024.columns; break;
				case ( c_w < 1200 ) : this.rows = this.options.w1200.rows; this.columns = this.options.w1200.columns; break;
				default : this.rows = this.options.rows; this.columns = this.options.columns; break;
			}

this.showTotal = this.rows * this.columns;

},
		
		
		// pixelwars edit
		// set container width
		_setContainerWidth	 : function() {

// container's width
			var containerWidth = ( document.defaultView ) ? parseInt( document.defaultView.getComputedStyle( this.$el.get( 0 ), null ).width ) : this.$el.width(),
			// item's width
			itemWidth = Math.floor( containerWidth / this.columns ),
			// calculate gap
			gapWidth = containerWidth - ( this.columns * Math.floor( itemWidth ) );
				
			for( var i = 0; i < this.rows; ++i ) {

for( var j = 0; j < this.columns; ++j ) {

var idx = this.columns * i + j,
						$item = this.$items.eq( idx );

$item.css( {
						width : j < Math.floor( gapWidth ) ? itemWidth + 1 : itemWidth,
						height : itemWidth
					} );

if( $.inArray( idx, this.options.nochange ) !== -1 ) {
						$item.addClass( 'ri-nochange' ).data( 'nochange', true );
					}

}

},
		// pixelwars edit
		
		
		// init window resize event
		_initEvents : function() {

var self = this;

$window.on( 'debouncedresize.gridrotator', function() {
				self._layout();
				
				// pixelwars edit
				setTimeout(function() { self._setContainerWidth(); },10);
				// pixelwars edit
				
			} );
			
			
			// pixelwars edit
			$window.on( 'load', function() {
				setTimeout(function() { self._setContainerWidth(); },10);
			} );
			// pixelwars edit
			
			
			// use the property name to generate the prefixed event name
			var visProp = getHiddenProp();
			
			// HTML5 PageVisibility API
			// http://www.html5rocks.com/en/tutorials/pagevisibility/intro/
			// by Joe Marini (@joemarini)
			if (visProp) {

var evtname = visProp.replace(/[H|h]idden/,'') + 'visibilitychange';
				document.addEventListener(evtname, function() { self._visChange(); } );

}

if( !Modernizr.touch && this.options.onhover ) {
				
				self.$items.on( 'mouseenter.gridrotator', function() {

var $item = $( this );
					if( !$item.data( 'active' ) && !$item.data( 'hovered' ) && !$item.data( 'nochange' ) ) {
						$item.data( 'hovered', true );
						self._replace( $item );
					}

} ).on( 'mouseleave.gridrotator', function() {

$( this ).data( 'hovered', false );

} );

}

},
		_visChange : function() {

isHidden() ? clearTimeout( this.playtimeout ) : this._start();

},
		// start rotating elements
		_start : function() {

if( this.showTotal < this.itemsTotal && this.options.slideshow ) {
				this._showNext();
			}

},
		// get which type of animation
		_getAnimType : function() {

return this.animType === 'random' ? this.animTypes[ Math.floor( Math.random() * this.animTypesTotal ) ] : this.animType;

},
		// get css properties for the transition effect
		_getAnimProperties : function( $out ) {

var startInProp = {}, startOutProp = {}, endInProp = {}, endOutProp = {},
				animType = this._getAnimType(), speed, delay = 0;

switch( animType ) {

case 'showHide' :
					
					speed = 0;
					endOutProp.opacity = 0;
					break;

case 'fadeInOut' :

endOutProp.opacity = 0;
					break;

case 'slideLeft' :
					
					startInProp.left = $out.width();
					endInProp.left = 0;
					endOutProp.left = -$out.width();
					break;

case 'slideRight' :
					
					startInProp.left = -$out.width();
					endInProp.left = 0;
					endOutProp.left = $out.width();
					break;

case 'slideTop' :
					
					startInProp.top = $out.height();
					endInProp.top = 0;
					endOutProp.top = -$out.height();
					break;

case 'slideBottom' :
					
					startInProp.top = -$out.height();
					endInProp.top = 0;
					endOutProp.top = $out.height();
					break;

case 'rotateLeft' :
					
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'rotateY(90deg)';
					endInProp.transform = 'rotateY(0deg)';
					delay = speed;
					endOutProp.transform = 'rotateY(-90deg)';
					break;

case 'rotateRight' :
					
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'rotateY(-90deg)';
					endInProp.transform = 'rotateY(0deg)';
					delay = speed;
					endOutProp.transform = 'rotateY(90deg)';
					break;

case 'rotateTop' :
					
					speed = this.options.animSpeed / 2;
					startInProp.transform= 'rotateX(90deg)';
					endInProp.transform = 'rotateX(0deg)';
					delay = speed;
					endOutProp.transform = 'rotateX(-90deg)';
					break;

case 'rotateBottom' :
					
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'rotateX(-90deg)';
					endInProp.transform = 'rotateX(0deg)';
					delay = speed;
					endOutProp.transform = 'rotateX(90deg)';
					break;

case 'scale' :
					
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'scale(0)';
					startOutProp.transform = 'scale(1)';
					endInProp.transform = 'scale(1)';
					delay = speed;
					endOutProp.transform = 'scale(0)';
					break;

case 'rotateLeftScale' :
					
					startOutProp.transform = 'scale(1)';
					speed = this.options.animSpeed / 2;	
					startInProp.transform = 'scale(0.3) rotateY(90deg)';
					endInProp.transform = 'scale(1) rotateY(0deg)';
					delay = speed;
					endOutProp.transform = 'scale(0.3) rotateY(-90deg)';
					break;

case 'rotateRightScale' :
					
					startOutProp.transform = 'scale(1)';
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'scale(0.3) rotateY(-90deg)';
					endInProp.transform = 'scale(1) rotateY(0deg)';
					delay = speed;
					endOutProp.transform = 'scale(0.3) rotateY(90deg)';
					break;

case 'rotateTopScale' :
					
					startOutProp.transform = 'scale(1)';
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'scale(0.3) rotateX(90deg)';
					endInProp.transform = 'scale(1) rotateX(0deg)';
					delay = speed;
					endOutProp.transform = 'scale(0.3) rotateX(-90deg)';
					break;

case 'rotateBottomScale' :
					
					startOutProp.transform = 'scale(1)';
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'scale(0.3) rotateX(-90deg)';
					endInProp.transform = 'scale(1) rotateX(0deg)';
					delay = speed;
					endOutProp.transform = 'scale(0.3) rotateX(90deg)';
					break;

case 'rotate3d' :
					
					speed = this.options.animSpeed / 2;
					startInProp.transform = 'rotate3d( 1, 1, 0, 90deg )';
					endInProp.transform = 'rotate3d( 1, 1, 0, 0deg )';
					delay = speed;
					endOutProp.transform = 'rotate3d( 1, 1, 0, -90deg )';
					break;

}

return {
				startInProp : startInProp,
				startOutProp : startOutProp,
				endInProp : endInProp,
				endOutProp : endOutProp,				
				delay : delay,
				animSpeed : speed != undefined ? speed : this.options.animSpeed
			};

},
		// show next [option.step] elements
		_showNext : function( time ) {

var self = this;

clearTimeout( this.playtimeout );

this.playtimeout = setTimeout( function() {

var step = self.options.step, max= self.options.maxStep, min = 1;
				
				if( max > self.showTotal ) {
					max = self.showTotal;
				}

// number of items to swith at this point of time
				var nmbOut	= step === 'random' ? Math.floor( Math.random() * max + min ) : Math.min( Math.abs( step ) , max ) ,
					// array with random indexes. These will be the indexes of the items we will replace
					randArr	= self._getRandom( nmbOut, self.showTotal );

for( var i = 0; i < nmbOut; ++i ) {

// element to go out
					var $out = self.$items.eq( randArr[ i ] );

// if element is active, which means it is currently animating,
					// then we need to get different positions.. 
					if( $out.data( 'active' ) || $out.data( 'nochange' ) ) {

// one of the items is active, call again..
						self._showNext( 1 );
						return false;

}

self._replace( $out );

}

// again and again..
				self._showNext();

}, time || Math.max( Math.abs( this.options.interval ) , 300 ) );

},
		_replace : function( $out ) {

$out.data( 'active', true );

var self = this,
				$outA = $out.children( 'a:last' ),
				newElProp = {
					width : $outA.width(),
					height : $outA.height()
				};

// element stays active
			$out.data( 'active', true );

// get the element (anchor) that will go in (first one inserted in this.outItems)
			var $inA = this.outItems.shift();

// save element that went out
			this.outItems.push( $outA.clone().css( 'transition', 'none' ) );
			
			// prepend in element
			$inA.css( newElProp ).prependTo( $out );

var animProp = this._getAnimProperties( $outA );

$inA.css( animProp.startInProp );
			$outA.css( animProp.startOutProp );
			
			this._setTransition( $inA, 'all', animProp.animSpeed, animProp.delay, this.options.animEasingIn );
			this._setTransition( $outA, 'all', animProp.animSpeed, 0, this.options.animEasingOut );

this._applyTransition( $inA, animProp.endInProp, animProp.animSpeed, function() {

var $el = $( this ),
					t = animProp.animSpeed === self.options.animSpeed && isEmpty( animProp.endInProp ) ? animProp.animSpeed : 0;
					
				setTimeout( function() {
					
					if( self.supportTransitions ) {
						$el.off( self.transEndEventName );
					}
					
					$el.next().remove();
					$el.parent().data( 'active', false );

}, t );

}, animProp.animSpeed === 0 || isEmpty( animProp.endInProp ) );
			this._applyTransition( $outA, animProp.endOutProp, animProp.animSpeed );

},
		_getRandom : function( cnt, limit ) {

var randArray = [];

for( var i = 0; i < limit; ++i ) {
				randArray.push( i )
			}
			
			return randArray.shuffle().slice( 0, cnt );

},
		_setTransition : function( el, prop, speed, delay, easing ) {

setTimeout( function() {
				el.css( 'transition', prop + ' ' + speed + 'ms ' + delay + 'ms ' + easing );
			}, 25 );

},
		_applyTransition : function( el, styleCSS, speed, fncomplete, force ) {

var self = this;
			setTimeout( function() {
				$.fn.applyStyle = self.supportTransitions ? $.fn.css : $.fn.animate;

if( fncomplete && self.supportTransitions ) {

el.on( self.transEndEventName, fncomplete );

if( force ) {
						fncomplete.call( el );					
					}

}

fncomplete = fncomplete || function() { return false; };

el.stop().applyStyle( styleCSS, $.extend( true, [], { duration : speed + 'ms', complete : fncomplete } ) );
			}, 25 );

}

};
	
	var logError = function( message ) {

if ( window.console ) {

window.console.error( message );
		
		}

};
	
	$.fn.gridrotator = function( options ) {

var instance = $.data( this, 'gridrotator' );
		
		if ( typeof options === 'string' ) {
			
			var args = Array.prototype.slice.call( arguments, 1 );
			
			this.each(function() {
			
				if ( !instance ) {

logError( "cannot call methods on gridrotator prior to initialization; " +
					"attempted to call method '" + options + "'" );
					return;
				
				}
				
				if ( !$.isFunction( instance[options] ) || options.charAt(0) === "_" ) {

logError( "no such method '" + options + "' for gridrotator instance" );
					return;
				
				}
				
				instance[ options ].apply( instance, args );
			
			});
		
		} 
		else {
		
			this.each(function() {
				
				if ( instance ) {

instance._init();
				
				}
				else {

instance = $.data( this, 'gridrotator', new $.GridRotator( options, this ) );
				
				}

});
		
		}
		
		return instance;
		
	};
	
} )( jQuery, window );