(function(){var __indexOf=[].indexOf||function(item){for(var i=0,l=this.length;i<l;i++){if(i in this&&this[i]===item)return i;}return-1;},__slice=[].slice;(function(root,factory){if(typeof define==='function'&&define.amd){return define('waypoints',['jquery'],function($){return factory($,root);});}else{return factory(root.jQuery,root);}})(window,function($,window){var $w,Context,Waypoint,allWaypoints,contextCounter,contextKey,contexts,isTouch,jQMethods,methods,resizeEvent,scrollEvent,waypointCounter,waypointKey,wp,wps;$w=$(window);isTouch=__indexOf.call(window,'ontouchstart')>=0;allWaypoints={horizontal:{},vertical:{}};contextCounter=1;contexts={};contextKey='waypoints-context-id';resizeEvent='resize.waypoints';scrollEvent='scroll.waypoints';waypointCounter=1;waypointKey='waypoints-waypoint-ids';wp='waypoint';wps='waypoints';Context=(function(){function Context($element){var _this=this;this.$element=$element;this.element=$element[0];this.didResize=false;this.didScroll=false;this.id='context'+contextCounter++;this.oldScroll={x:$element.scrollLeft(),y:$element.scrollTop()};this.waypoints={horizontal:{},vertical:{}};this.element[contextKey]=this.id;contexts[this.id]=this;$element.bind(scrollEvent,function(){var scrollHandler;if(!(_this.didScroll||isTouch)){_this.didScroll=true;scrollHandler=function(){_this.doScroll();return _this.didScroll=false;};return window.setTimeout(scrollHandler,$[wps].settings.scrollThrottle);}});$element.bind(resizeEvent,function(){var resizeHandler;if(!_this.didResize){_this.didResize=true;resizeHandler=function(){$[wps]('refresh');return _this.didResize=false;};return window.setTimeout(resizeHandler,$[wps].settings.resizeThrottle);}});}
    Context.prototype.doScroll=function(){var axes,_this=this;axes={horizontal:{newScroll:this.$element.scrollLeft(),oldScroll:this.oldScroll.x,forward:'right',backward:'left'},vertical:{newScroll:this.$element.scrollTop(),oldScroll:this.oldScroll.y,forward:'down',backward:'up'}};if(isTouch&&(!axes.vertical.oldScroll||!axes.vertical.newScroll)){$[wps]('refresh');}
        $.each(axes,function(aKey,axis){var direction,isForward,triggered;triggered=[];isForward=axis.newScroll>axis.oldScroll;direction=isForward?axis.forward:axis.backward;$.each(_this.waypoints[aKey],function(wKey,waypoint){var _ref,_ref1;if((axis.oldScroll<(_ref=waypoint.offset)&&_ref<=axis.newScroll)){return triggered.push(waypoint);}else if((axis.newScroll<(_ref1=waypoint.offset)&&_ref1<=axis.oldScroll)){return triggered.push(waypoint);}});triggered.sort(function(a,b){return a.offset-b.offset;});if(!isForward){triggered.reverse();}
            return $.each(triggered,function(i,waypoint){if(waypoint.options.continuous||i===triggered.length-1){return waypoint.trigger([direction]);}});});return this.oldScroll={x:axes.horizontal.newScroll,y:axes.vertical.newScroll};};Context.prototype.refresh=function(){var axes,cOffset,isWin,_this=this;isWin=$.isWindow(this.element);cOffset=this.$element.offset();this.doScroll();axes={horizontal:{contextOffset:isWin?0:cOffset.left,contextScroll:isWin?0:this.oldScroll.x,contextDimension:this.$element.width(),oldScroll:this.oldScroll.x,forward:'right',backward:'left',offsetProp:'left'},vertical:{contextOffset:isWin?0:cOffset.top,contextScroll:isWin?0:this.oldScroll.y,contextDimension:isWin?$[wps]('viewportHeight'):this.$element.height(),oldScroll:this.oldScroll.y,forward:'down',backward:'up',offsetProp:'top'}};return $.each(axes,function(aKey,axis){return $.each(_this.waypoints[aKey],function(i,waypoint){var adjustment,elementOffset,oldOffset,_ref,_ref1;adjustment=waypoint.options.offset;oldOffset=waypoint.offset;elementOffset=$.isWindow(waypoint.element)?0:waypoint.$element.offset()[axis.offsetProp];if($.isFunction(adjustment)){adjustment=adjustment.apply(waypoint.element);}else if(typeof adjustment==='string'){adjustment=parseFloat(adjustment);if(waypoint.options.offset.indexOf('%')>-1){adjustment=Math.ceil(axis.contextDimension*adjustment/100);}}
        waypoint.offset=elementOffset-axis.contextOffset+axis.contextScroll-adjustment;if((waypoint.options.onlyOnScroll&&(oldOffset!=null))||!waypoint.enabled){return;}
        if(oldOffset!==null&&(oldOffset<(_ref=axis.oldScroll)&&_ref<=waypoint.offset)){return waypoint.trigger([axis.backward]);}else if(oldOffset!==null&&(oldOffset>(_ref1=axis.oldScroll)&&_ref1>=waypoint.offset)){return waypoint.trigger([axis.forward]);}else if(oldOffset===null&&axis.oldScroll>=waypoint.offset){return waypoint.trigger([axis.forward]);}});});};Context.prototype.checkEmpty=function(){if($.isEmptyObject(this.waypoints.horizontal)&&$.isEmptyObject(this.waypoints.vertical)){this.$element.unbind([resizeEvent,scrollEvent].join(' '));return delete contexts[this.id];}};return Context;})();Waypoint=(function(){function Waypoint($element,context,options){var idList,_ref;if(options.offset==='bottom-in-view'){options.offset=function(){var contextHeight;contextHeight=$[wps]('viewportHeight');if(!$.isWindow(context.element)){contextHeight=context.$element.height();}
    return contextHeight-$(this).outerHeight();};}
    this.$element=$element;this.element=$element[0];this.axis=options.horizontal?'horizontal':'vertical';this.callback=options.handler;this.context=context;this.enabled=options.enabled;this.id='waypoints'+waypointCounter++;this.offset=null;this.options=options;context.waypoints[this.axis][this.id]=this;allWaypoints[this.axis][this.id]=this;idList=(_ref=this.element[waypointKey])!=null?_ref:[];idList.push(this.id);this.element[waypointKey]=idList;}
    Waypoint.prototype.trigger=function(args){if(!this.enabled){return;}
        if(this.callback!=null){this.callback.apply(this.element,args);}
        if(this.options.triggerOnce){return this.destroy();}};Waypoint.prototype.disable=function(){return this.enabled=false;};Waypoint.prototype.enable=function(){this.context.refresh();return this.enabled=true;};Waypoint.prototype.destroy=function(){delete allWaypoints[this.axis][this.id];delete this.context.waypoints[this.axis][this.id];return this.context.checkEmpty();};Waypoint.getWaypointsByElement=function(element){var all,ids;ids=element[waypointKey];if(!ids){return[];}
        all=$.extend({},allWaypoints.horizontal,allWaypoints.vertical);return $.map(ids,function(id){return all[id];});};return Waypoint;})();methods={init:function(f,options){var _ref;options=$.extend({},$.fn[wp].defaults,options);if((_ref=options.handler)==null){options.handler=f;}
    this.each(function(){var $this,context,contextElement,_ref1;$this=$(this);contextElement=(_ref1=options.context)!=null?_ref1:$.fn[wp].defaults.context;if(!$.isWindow(contextElement)){contextElement=$this.closest(contextElement);}
        contextElement=$(contextElement);context=contexts[contextElement[0][contextKey]];if(!context){context=new Context(contextElement);}
        return new Waypoint($this,context,options);});$[wps]('refresh');return this;},disable:function(){return methods._invoke.call(this,'disable');},enable:function(){return methods._invoke.call(this,'enable');},destroy:function(){return methods._invoke.call(this,'destroy');},prev:function(axis,selector){return methods._traverse.call(this,axis,selector,function(stack,index,waypoints){if(index>0){return stack.push(waypoints[index-1]);}});},next:function(axis,selector){return methods._traverse.call(this,axis,selector,function(stack,index,waypoints){if(index<waypoints.length-1){return stack.push(waypoints[index+1]);}});},_traverse:function(axis,selector,push){var stack,waypoints;if(axis==null){axis='vertical';}
    if(selector==null){selector=window;}
    waypoints=jQMethods.aggregate(selector);stack=[];this.each(function(){var index;index=$.inArray(this,waypoints[axis]);return push(stack,index,waypoints[axis]);});return this.pushStack(stack);},_invoke:function(method){this.each(function(){var waypoints;waypoints=Waypoint.getWaypointsByElement(this);return $.each(waypoints,function(i,waypoint){waypoint[method]();return true;});});return this;}};$.fn[wp]=function(){var args,method;method=arguments[0],args=2<=arguments.length?__slice.call(arguments,1):[];if(methods[method]){return methods[method].apply(this,args);}else if($.isFunction(method)){return methods.init.apply(this,arguments);}else if($.isPlainObject(method)){return methods.init.apply(this,[null,method]);}else if(!method){return $.error("jQuery Waypoints needs a callback function or handler option.");}else{return $.error("The "+method+" method does not exist in jQuery Waypoints.");}};$.fn[wp].defaults={context:window,continuous:true,enabled:true,horizontal:false,offset:0,triggerOnce:false};jQMethods={refresh:function(){return $.each(contexts,function(i,context){return context.refresh();});},viewportHeight:function(){var _ref;return(_ref=window.innerHeight)!=null?_ref:$w.height();},aggregate:function(contextSelector){var collection,waypoints,_ref;collection=allWaypoints;if(contextSelector){collection=(_ref=contexts[$(contextSelector)[0][contextKey]])!=null?_ref.waypoints:void 0;}
    if(!collection){return[];}
    waypoints={horizontal:[],vertical:[]};$.each(waypoints,function(axis,arr){$.each(collection[axis],function(key,waypoint){return arr.push(waypoint);});arr.sort(function(a,b){return a.offset-b.offset;});waypoints[axis]=$.map(arr,function(waypoint){return waypoint.element;});return waypoints[axis]=$.unique(waypoints[axis]);});return waypoints;},above:function(contextSelector){if(contextSelector==null){contextSelector=window;}
    return jQMethods._filter(contextSelector,'vertical',function(context,waypoint){return waypoint.offset<=context.oldScroll.y;});},below:function(contextSelector){if(contextSelector==null){contextSelector=window;}
    return jQMethods._filter(contextSelector,'vertical',function(context,waypoint){return waypoint.offset>context.oldScroll.y;});},left:function(contextSelector){if(contextSelector==null){contextSelector=window;}
    return jQMethods._filter(contextSelector,'horizontal',function(context,waypoint){return waypoint.offset<=context.oldScroll.x;});},right:function(contextSelector){if(contextSelector==null){contextSelector=window;}
    return jQMethods._filter(contextSelector,'horizontal',function(context,waypoint){return waypoint.offset>context.oldScroll.x;});},enable:function(){return jQMethods._invoke('enable');},disable:function(){return jQMethods._invoke('disable');},destroy:function(){return jQMethods._invoke('destroy');},extendFn:function(methodName,f){return methods[methodName]=f;},_invoke:function(method){var waypoints;waypoints=$.extend({},allWaypoints.vertical,allWaypoints.horizontal);return $.each(waypoints,function(key,waypoint){waypoint[method]();return true;});},_filter:function(selector,axis,test){var context,waypoints;context=contexts[$(selector)[0][contextKey]];if(!context){return[];}
    waypoints=[];$.each(context.waypoints[axis],function(i,waypoint){if(test(context,waypoint)){return waypoints.push(waypoint);}});waypoints.sort(function(a,b){return a.offset-b.offset;});return $.map(waypoints,function(waypoint){return waypoint.element;});}};$[wps]=function(){var args,method;method=arguments[0],args=2<=arguments.length?__slice.call(arguments,1):[];if(jQMethods[method]){return jQMethods[method].apply(null,args);}else{return jQMethods.aggregate.call(null,method);}};$[wps].settings={resizeThrottle:100,scrollThrottle:30};return $w.on('load.waypoints',function(){return $[wps]('refresh');});});}).call(this);/**
 * Created by wy on 2017/8/14.
 */