(function(factory){if(typeof define=='function'&&define.amd){define(['jquery'],factory);}else if(typeof exports==='object'){module.exports=factory(require('jquery'));}else{factory(jQuery);}}(function($){var inviewObjects=[],viewportSize,viewportOffset,d=document,w=window,documentElement=d.documentElement,timer;$.event.special.inview={add:function(data){inviewObjects.push({data:data,$element:$(this),element:this});if(!timer&&inviewObjects.length){timer=setInterval(checkInView,250);}},remove:function(data){for(var i=0;i<inviewObjects.length;i++){var inviewObject=inviewObjects[i];if(inviewObject.element===this&&inviewObject.data.guid===data.guid){inviewObjects.splice(i,1);break;}}
if(!inviewObjects.length){clearInterval(timer);timer=null;}}};function getViewportSize(){var mode,domObject,size={height:w.innerHeight,width:w.innerWidth};if(!size.height){mode=d.compatMode;if(mode||!$.support.boxModel){domObject=mode==='CSS1Compat'?documentElement:d.body;size={height:domObject.clientHeight,width:domObject.clientWidth};}}
return size;}
function getViewportOffset(){return{top:w.pageYOffset||documentElement.scrollTop||d.body.scrollTop,left:w.pageXOffset||documentElement.scrollLeft||d.body.scrollLeft};}
function checkInView(){if(!inviewObjects.length){return;}
var i=0,$elements=$.map(inviewObjects,function(inviewObject){var selector=inviewObject.data.selector,$element=inviewObject.$element;return selector?$element.find(selector):$element;});viewportSize=viewportSize||getViewportSize();viewportOffset=viewportOffset||getViewportOffset();for(;i<inviewObjects.length;i++){if(!$.contains(documentElement,$elements[i][0])){continue;}
var $element=$($elements[i]),elementSize={height:$element[0].offsetHeight,width:$element[0].offsetWidth},elementOffset=$element.offset(),inView=$element.data('inview'),elementExtraOffset=$element.data('inview-offset')?$element.data('inview-offset'):0;if(!viewportOffset||!viewportSize){return;}
if(elementOffset.top+elementSize.height>viewportOffset.top-elementExtraOffset&&elementOffset.top+elementExtraOffset<viewportOffset.top+viewportSize.height&&elementOffset.left+elementSize.width>viewportOffset.left&&elementOffset.left<viewportOffset.left+viewportSize.width){if(!inView){$element.data('inview',true).trigger('inview',[true]);}}else if(inView){$element.data('inview',false).trigger('inview',[false]);}}}
$(w).on("scroll resize scrollstop",function(){viewportSize=viewportOffset=null;});if(!documentElement.addEventListener&&documentElement.attachEvent){documentElement.attachEvent("onfocusin",function(){viewportOffset=null;});}}));