foggy.js

// Foggy, v1.1.1
//
// Description: jQuery plugin for blurring page elements
// Homepage:    http://nbartlomiej.github.com/foggy
// Author:      nbartlomiej@gmail.com

(function(e){e.fn.foggy=function(t){var n={opacity:.8,blurRadius:2,quality:16,cssFilterSupport:true};var r={opacity:1,blurRadius:0};var i;if(t==false){i=e.extend(n,r)}else{i=e.extend(n,t)}var s=function(e,t,n,r){this.content=e;this.position=t;this.offset=n;this.opacity=r};s.prototype.render=function(t){e("<div/>",{html:this.content,"class":"foggy-pass-"+this.position}).css({position:this.position,opacity:this.opacity,top:this.offset[0],left:this.offset[1]}).appendTo(t)};var o=function(e){this.radius=e};o.prototype.includes=function(e,t){if(Math.pow(e,2)+Math.pow(t,2)<=Math.pow(this.radius,2)){return true}else{return false}};o.prototype.points=function(){var e=[];for(var t=-this.radius;t<=this.radius;t++){for(var n=-this.radius;n<=this.radius;n++){if(this.includes(t,n)){e.push([t,n])}}}return e};var u=function(e,t){this.element=e;this.settings=t};u.prototype.calculateOffsets=function(t,n){var r=e.grep((new o(t)).points(),function(e){return e[0]!=0||e[1]!=0});var i;if(r.length<=n){i=r}else{var s=r.length-n;var u=[];for(var a=0;a<s;a++){u.push(Math.round(a*(r.length/s)))}i=e.grep(r,function(t,n){if(e.inArray(n,u)>=0){return false}else{return true}})}return i};u.prototype.getContent=function(){var t=e(this.element).find(".foggy-pass-relative")[0];if(t){return e(t).html()}else{return e(this.element).html()}};u.prototype.render=function(){var t=this.getContent();e(this.element).empty();var n=e("<div/>").css({position:"relative"});var r=this.calculateOffsets(this.settings.blurRadius*2,this.settings.quality);var i=this.settings.opacity*1.2/(r.length+1);(new s(t,"relative",[0,0],i)).render(n);e(r).each(function(e,r){(new s(t,"absolute",r,i)).render(n)});n.appendTo(this.element)};var a=function(e,t){this.element=e;this.settings=t};a.prototype.render=function(){var t=(""+i.opacity).slice(2,4);var n=this.settings.blurRadius;e(this.element).css({"-webkit-filter":"blur("+n+"px)",opacity:i.opacity})};return this.each(function(e,t){if(i.cssFilterSupport&&"-webkit-filter"in document.body.style){(new a(t,i)).render()}else{(new u(t,i)).render()}})}})(jQuery)