1/*! 2Waypoints - 4.0.0 3Copyright © 2011-2015 Caleb Troughton 4Licensed under the MIT license. 5https://github.com/imakewebthings/waypoints/blog/master/licenses.txt 6*/ 7(function(){'use strict' 8var keyCounter=0 9var allWaypoints={} 10function Waypoint(options){if(!options){throw new Error('No options passed to Waypoint constructor')} 11if(!options.element){throw new Error('No element option passed to Waypoint constructor')} 12if(!options.handler){throw new Error('No handler option passed to Waypoint constructor')} 13this.key='waypoint-'+keyCounter 14this.options=Waypoint.Adapter.extend({},Waypoint.defaults,options) 15this.element=this.options.element 16this.adapter=new Waypoint.Adapter(this.element) 17this.callback=options.handler 18this.axis=this.options.horizontal?'horizontal':'vertical' 19this.enabled=this.options.enabled 20this.triggerPoint=null 21this.group=Waypoint.Group.findOrCreate({name:this.options.group,axis:this.axis}) 22this.context=Waypoint.Context.findOrCreateByElement(this.options.context) 23if(Waypoint.offsetAliases[this.options.offset]){this.options.offset=Waypoint.offsetAliases[this.options.offset]} 24this.group.add(this) 25this.context.add(this) 26allWaypoints[this.key]=this 27keyCounter+=1} 28Waypoint.prototype.queueTrigger=function(direction){this.group.queueTrigger(this,direction)} 29Waypoint.prototype.trigger=function(args){if(!this.enabled){return} 30if(this.callback){this.callback.apply(this,args)}} 31Waypoint.prototype.destroy=function(){this.context.remove(this) 32this.group.remove(this) 33delete allWaypoints[this.key]} 34Waypoint.prototype.disable=function(){this.enabled=!1 35return this} 36Waypoint.prototype.enable=function(){this.context.refresh() 37this.enabled=!0 38return this} 39Waypoint.prototype.next=function(){return this.group.next(this)} 40Waypoint.prototype.previous=function(){return this.group.previous(this)} 41Waypoint.invokeAll=function(method){var allWaypointsArray=[] 42for(var waypointKey in allWaypoints){allWaypointsArray.push(allWaypoints[waypointKey])} 43for(var i=0,end=allWaypointsArray.length;i<end;i++){allWaypointsArray[i][method]()}} 44Waypoint.destroyAll=function(){Waypoint.invokeAll('destroy')} 45Waypoint.disableAll=function(){Waypoint.invokeAll('disable')} 46Waypoint.enableAll=function(){Waypoint.invokeAll('enable')} 47Waypoint.refreshAll=function(){Waypoint.Context.refreshAll()} 48Waypoint.viewportHeight=function(){return window.innerHeight||document.documentElement.clientHeight} 49Waypoint.viewportWidth=function(){return document.documentElement.clientWidth} 50Waypoint.adapters=[] 51Waypoint.defaults={context:window,continuous:!0,enabled:!0,group:'default',horizontal:!1,offset:0} 52Waypoint.offsetAliases={'bottom-in-view':function(){return this.context.innerHeight()-this.adapter.outerHeight()},'right-in-view':function(){return this.context.innerWidth()-this.adapter.outerWidth()}} 53window.Waypoint=Waypoint}());(function(){'use strict' 54function requestAnimationFrameShim(callback){window.setTimeout(callback,1000/60)} 55var keyCounter=0 56var contexts={} 57var Waypoint=window.Waypoint 58var oldWindowLoad=window.onload 59function Context(element){this.element=element 60this.Adapter=Waypoint.Adapter 61this.adapter=new this.Adapter(element) 62this.key='waypoint-context-'+keyCounter 63this.didScroll=!1 64this.didResize=!1 65this.oldScroll={x:this.adapter.scrollLeft(),y:this.adapter.scrollTop()} 66this.waypoints={vertical:{},horizontal:{}} 67element.waypointContextKey=this.key 68contexts[element.waypointContextKey]=this 69keyCounter+=1 70this.createThrottledScrollHandler() 71this.createThrottledResizeHandler()} 72Context.prototype.add=function(waypoint){var axis=waypoint.options.horizontal?'horizontal':'vertical' 73this.waypoints[axis][waypoint.key]=waypoint 74this.refresh()} 75Context.prototype.checkEmpty=function(){var horizontalEmpty=this.Adapter.isEmptyObject(this.waypoints.horizontal) 76var verticalEmpty=this.Adapter.isEmptyObject(this.waypoints.vertical) 77if(horizontalEmpty&&verticalEmpty){this.adapter.off('.waypoints') 78delete contexts[this.key]}} 79Context.prototype.createThrottledResizeHandler=function(){var self=this 80function resizeHandler(){self.handleResize() 81self.didResize=!1} 82this.adapter.on('resize.waypoints',function(){if(!self.didResize){self.didResize=!0 83Waypoint.requestAnimationFrame(resizeHandler)}})} 84Context.prototype.createThrottledScrollHandler=function(){var self=this 85function scrollHandler(){self.handleScroll() 86self.didScroll=!1} 87this.adapter.on('scroll.waypoints',function(){if(!self.didScroll||Waypoint.isTouch){self.didScroll=!0 88Waypoint.requestAnimationFrame(scrollHandler)}})} 89Context.prototype.handleResize=function(){Waypoint.Context.refreshAll()} 90Context.prototype.handleScroll=function(){var triggeredGroups={} 91var axes={horizontal:{newScroll:this.adapter.scrollLeft(),oldScroll:this.oldScroll.x,forward:'right',backward:'left'},vertical:{newScroll:this.adapter.scrollTop(),oldScroll:this.oldScroll.y,forward:'down',backward:'up'}} 92for(var axisKey in axes){var axis=axes[axisKey] 93var isForward=axis.newScroll>axis.oldScroll 94var direction=isForward?axis.forward:axis.backward
95for(var waypointKey in this.waypoints[axisKey]){var waypoint=this.waypoints[axisKey][waypointKey] 96var wasBeforeTriggerPoint=axis.oldScroll<waypoint.triggerPoint 97var nowAfterTriggerPoint=axis.newScroll>=waypoint.triggerPoint 98var crossedForward=wasBeforeTriggerPoint&&nowAfterTriggerPoint 99var crossedBackward=!wasBeforeTriggerPoint&&!nowAfterTriggerPoint 100if(crossedForward||crossedBackward){waypoint.queueTrigger(direction) 101triggeredGroups[waypoint.group.id]=waypoint.group}}} 102for(var groupKey in triggeredGroups){triggeredGroups[groupKey].flushTriggers()} 103this.oldScroll={x:axes.horizontal.newScroll,y:axes.vertical.newScroll}} 104Context.prototype.innerHeight=function(){if(this.element==this.element.window){return Waypoint.viewportHeight()} 105return this.adapter.innerHeight()} 106Context.prototype.remove=function(waypoint){delete this.waypoints[waypoint.axis][waypoint.key] 107this.checkEmpty()} 108Context.prototype.innerWidth=function(){if(this.element==this.element.window){return Waypoint.viewportWidth()} 109return this.adapter.innerWidth()} 110Context.prototype.destroy=function(){var allWaypoints=[] 111for(var axis in this.waypoints){for(var waypointKey in this.waypoints[axis]){allWaypoints.push(this.waypoints[axis][waypointKey])}} 112for(var i=0,end=allWaypoints.length;i<end;i++){allWaypoints[i].destroy()}} 113Context.prototype.refresh=function(){var isWindow=this.element==this.element.window 114var contextOffset=isWindow?undefined:this.adapter.offset() 115var triggeredGroups={} 116var axes 117this.handleScroll() 118axes={horizontal:{contextOffset:isWindow?0:contextOffset.left,contextScroll:isWindow?0:this.oldScroll.x,contextDimension:this.innerWidth(),oldScroll:this.oldScroll.x,forward:'right',backward:'left',offsetProp:'left'},vertical:{contextOffset:isWindow?0:contextOffset.top,contextScroll:isWindow?0:this.oldScroll.y,contextDimension:this.innerHeight(),oldScroll:this.oldScroll.y,forward:'down',backward:'up',offsetProp:'top'}} 119for(var axisKey in axes){var axis=axes[axisKey] 120for(var waypointKey in this.waypoints[axisKey]){var waypoint=this.waypoints[axisKey][waypointKey] 121var adjustment=waypoint.options.offset 122var oldTriggerPoint=waypoint.triggerPoint 123var elementOffset=0 124var freshWaypoint=oldTriggerPoint==null 125var contextModifier,wasBeforeScroll,nowAfterScroll 126var triggeredBackward,triggeredForward 127if(waypoint.element!==waypoint.element.window){elementOffset=waypoint.adapter.offset()[axis.offsetProp]} 128if(typeof adjustment==='function'){adjustment=adjustment.apply(waypoint)}else if(typeof adjustment==='string'){adjustment=parseFloat(adjustment) 129if(waypoint.options.offset.indexOf('%')>-1){adjustment=Math.ceil(axis.contextDimension*adjustment/100)}} 130contextModifier=axis.contextScroll-axis.contextOffset 131waypoint.triggerPoint=elementOffset+contextModifier-adjustment 132wasBeforeScroll=oldTriggerPoint<axis.oldScroll 133nowAfterScroll=waypoint.triggerPoint>=axis.oldScroll 134triggeredBackward=wasBeforeScroll&&nowAfterScroll 135triggeredForward=!wasBeforeScroll&&!nowAfterScroll 136if(!freshWaypoint&&triggeredBackward){waypoint.queueTrigger(axis.backward) 137triggeredGroups[waypoint.group.id]=waypoint.group}else if(!freshWaypoint&&triggeredForward){waypoint.queueTrigger(axis.forward) 138triggeredGroups[waypoint.group.id]=waypoint.group}else if(freshWaypoint&&axis.oldScroll>=waypoint.triggerPoint){waypoint.queueTrigger(axis.forward) 139triggeredGroups[waypoint.group.id]=waypoint.group}}} 140Waypoint.requestAnimationFrame(function(){for(var groupKey in triggeredGroups){triggeredGroups[groupKey].flushTriggers()}}) 141return this} 142Context.findOrCreateByElement=function(element){return Context.findByElement(element)||new Context(element)} 143Context.refreshAll=function(){for(var contextId in contexts){contexts[contextId].refresh()}} 144Context.findByElement=function(element){return contexts[element.waypointContextKey]} 145window.onload=function(){if(oldWindowLoad){oldWindowLoad()} 146Context.refreshAll()} 147Waypoint.requestAnimationFrame=function(callback){var requestFn=window.requestAnimationFrame||window.mozRequestAnimationFrame||window.webkitRequestAnimationFrame||requestAnimationFrameShim 148requestFn.call(window,callback)} 149Waypoint.Context=Context}());(function(){'use strict' 150function byTriggerPoint(a,b){return a.triggerPoint-b.triggerPoint} 151function byReverseTriggerPoint(a,b){return b.triggerPoint-a.triggerPoint} 152var groups={vertical:{},horizontal:{}} 153var Waypoint=window.Waypoint 154function Group(options){this.name=options.name 155this.axis=options.axis 156this.id=this.name+'-'+this.axis 157this.waypoints=[] 158this.clearTriggerQueues() 159groups[this.axis][this.name]=this} 160Group.prototype.add=function(waypoint){this.waypoints.push(waypoint)} 161Group.prototype.clearTriggerQueues=function(){this.triggerQueues={up:[],down:[],left:[],r
161ight:[]}} 162Group.prototype.flushTriggers=function(){for(var direction in this.triggerQueues){var waypoints=this.triggerQueues[direction] 163var reverse=direction==='up'||direction==='left' 164waypoints.sort(reverse?byReverseTriggerPoint:byTriggerPoint) 165for(var i=0,end=waypoints.length;i<end;i+=1){var waypoint=waypoints[i] 166if(waypoint.options.continuous||i===waypoints.length-1){waypoint.trigger([direction])}}} 167this.clearTriggerQueues()} 168Group.prototype.next=function(waypoint){this.waypoints.sort(byTriggerPoint) 169var index=Waypoint.Adapter.inArray(waypoint,this.waypoints) 170var isLast=index===this.waypoints.length-1 171return isLast?null:this.waypoints[index+1]} 172Group.prototype.previous=function(waypoint){this.waypoints.sort(byTriggerPoint) 173var index=Waypoint.Adapter.inArray(waypoint,this.waypoints) 174return index?this.waypoints[index-1]:null} 175Group.prototype.queueTrigger=function(waypoint,direction){this.triggerQueues[direction].push(waypoint)} 176Group.prototype.remove=function(waypoint){var index=Waypoint.Adapter.inArray(waypoint,this.waypoints) 177if(index>-1){this.waypoints.splice(index,1)}} 178Group.prototype.first=function(){return this.waypoints[0]} 179Group.prototype.last=function(){return this.waypoints[this.waypoints.length-1]} 180Group.findOrCreate=function(options){return groups[options.axis][options.name]||new Group(options)} 181Waypoint.Group=Group}());(function(){'use strict' 182var $=window.jQuery 183var Waypoint=window.Waypoint 184function JQueryAdapter(element){this.$element=$(element)} 185$.each(['innerHeight','innerWidth','off','offset','on','outerHeight','outerWidth','scrollLeft','scrollTop'],function(i,method){JQueryAdapter.prototype[method]=function(){var args=Array.prototype.slice.call(arguments) 186return this.$element[method].apply(this.$element,args)}}) 187$.each(['extend','inArray','isEmptyObject'],function(i,method){JQueryAdapter[method]=$[method]}) 188Waypoint.adapters.push({name:'jquery',Adapter:JQueryAdapter}) 189Waypoint.Adapter=JQueryAdapter}());(function(){'use strict' 190var Waypoint=window.Waypoint 191function createExtension(framework){return function(){var waypoints=[] 192var overrides=arguments[0] 193if(framework.isFunction(arguments[0])){overrides=framework.extend({},arguments[1]) 194overrides.handler=arguments[0]} 195this.each(function(){var options=framework.extend({},overrides,{element:this}) 196if(typeof options.context==='string'){options.context=framework(this).closest(options.context)[0]} 197waypoints.push(new Waypoint(options))}) 198return waypoints}} 199if(window.jQuery){window.jQuery.fn.waypoint=createExtension(window.jQuery)} 200if(window.Zepto){window.Zepto.fn.waypoint=createExtension(window.Zepto)}}())
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