jquery.viewportchecker.min.js

/**
 * jQuery-viewport-checker - v1.8.7 - 2015-12-17
 * https://github.com/dirkgroenen/jQuery-viewport-checker
 *
 * Copyright (c) 2015 Dirk Groenen
 * Licensed MIT <https://github.com/dirkgroenen/jQuery-viewport-checker/blob/master/LICENSE>
 */

!function(a){a.fn.viewportChecker=function(b){var c={classToAdd:"visible",classToRemove:"invisible",classToAddForFullView:"full-visible",removeClassAfterAnimation:!1,offset:100,repeat:!1,invertBottomOffset:!0,callbackFunction:function(a,b){},scrollHorizontal:!1,scrollBox:window};a.extend(c,b);var d=this,e={height:a(c.scrollBox).height(),width:a(c.scrollBox).width()},f=-1!=navigator.userAgent.toLowerCase().indexOf("webkit")||-1!=navigator.userAgent.toLowerCase().indexOf("windows phone")?"body":"html";return this.checkElements=function(){var b,g;c.scrollHorizontal?(b=a(f).scrollLeft(),g=b+e.width):(b=a(f).scrollTop(),g=b+e.height),d.each(function(){var d=a(this),f={},h={};if(d.data("vp-add-class")&&(h.classToAdd=d.data("vp-add-class")),d.data("vp-remove-class")&&(h.classToRemove=d.data("vp-remove-class")),d.data("vp-add-class-full-view")&&(h.classToAddForFullView=d.data("vp-add-class-full-view")),d.data("vp-keep-add-class")&&(h.removeClassAfterAnimation=d.data("vp-remove-after-animation")),d.data("vp-offset")&&(h.offset=d.data("vp-offset")),d.data("vp-repeat")&&(h.repeat=d.data("vp-repeat")),d.data("vp-scrollHorizontal")&&(h.scrollHorizontal=d.data("vp-scrollHorizontal")),d.data("vp-invertBottomOffset")&&(h.scrollHorizontal=d.data("vp-invertBottomOffset")),a.extend(f,c),a.extend(f,h),!d.data("vp-animated")||f.repeat){String(f.offset).indexOf("%")>0&&(f.offset=parseInt(f.offset)/100*e.height);var i=f.scrollHorizontal?d.offset().left:d.offset().top,j=f.scrollHorizontal?i+d.width():i+d.height(),k=Math.round(i)+f.offset,l=f.scrollHorizontal?k+d.width():k+d.height();f.invertBottomOffset&&(l-=2*f.offset),g>k&&l>b?(d.removeClass(f.classToRemove),d.addClass(f.classToAdd),f.callbackFunction(d,"add"),g>=j&&i>=b?d.addClass(f.classToAddForFullView):d.removeClass(f.classToAddForFullView),d.data("vp-animated",!0),f.removeClassAfterAnimation&&d.one("webkitAnimationEnd mozAnimationEnd MSAnimationEnd oanimationend animationend",function(){d.removeClass(f.classToAdd)})):d.hasClass(f.classToAdd)&&f.repeat&&(d.removeClass(f.classToAdd+" "+f.classToAddForFullView),f.callbackFunction(d,"remove"),d.data("vp-animated",!1))}})},("ontouchstart"in window||"onmsgesturechange"in window)&&a(document).bind("touchmove MSPointerMove pointermove",this.checkElements),a(c.scrollBox).bind("load scroll",this.checkElements),a(window).resize(function(b){e={height:a(c.scrollBox).height(),width:a(c.scrollBox).width()},d.checkElements()}),this.checkElements(),this}}(jQuery);
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