window.tagcloud=(function(win,doc){function isObject(obj){return Object.prototype.toString.call(obj)==='[object Object]';}
function TagCloud(options){var self=this;self.config=TagCloud._getConfig(options);self.box=self.config.element;self.fontsize=self.config.fontsize;self.radius=self.config.radius;self.depth=2*self.radius;self.size=2*self.radius;self.mspeed=TagCloud._getMsSpeed(self.config.mspeed);self.ispeed=TagCloud._getIsSpeed(self.config.ispeed);self.items=self._getItems();self.direction=self.config.direction;self.keep=self.config.keep;self.active=false;self.lasta=1;self.lastb=1;self.mouseX0=self.ispeed*Math.sin(self.direction*Math.PI/180);self.mouseY0=-self.ispeed*Math.cos(self.direction*Math.PI/180);self.mouseX=self.mouseX0;self.mouseY=self.mouseY0;self.index=-1;TagCloud._on(self.box,'mouseover',function(){self.active=true;});TagCloud._on(self.box,'mouseout',function(){self.active=false;});TagCloud._on(self.keep?win:self.box,'mousemove',function(ev){var oEvent=win.event||ev;var boxPosition=self.box.getBoundingClientRect();self.mouseX=(oEvent.clientX-(boxPosition.left+self.box.offsetWidth/2))/5;self.mouseY=(oEvent.clientY-(boxPosition.top+self.box.offsetHeight/2))/5;});for(var j=0,len=self.items.length;j<len;j++){self.items[j].element.index=j;self.items[j].element.onmouseover=function(){self.index=this.index;};self.items[j].element.onmouseout=function(){self.index=-1;};}
TagCloud.boxs.push(self.box);self.update(self);self.box.style.visibility="visible";self.box.style.position="relative";self.box.style.minHeight=1.2*self.size+"px";self.box.style.minWidth=2.5*self.size+"px";for(var j=0,len=self.items.length;j<len;j++){self.items[j].element.style.position="absolute";self.items[j].element.style.zIndex=j+1;}
self.up=setInterval(function(){self.update(self);},30);}
TagCloud.boxs=[];TagCloud._set=function(element){if(TagCloud.boxs.indexOf(element)==-1){return true;}};if(!Array.prototype.indexOf){Array.prototype.indexOf=function(elt){var len=this.length>>>0;var from=Number(arguments[1])||0;from=(from<0)?Math.ceil(from):Math.floor(from);if(from<0)
from+=len;for(;from<len;from++){if(from in this&&this[from]===elt)
return from;}
return-1;};}
TagCloud._getConfig=function(config){var defaultConfig={fontsize:16,radius:60,mspeed:"normal",ispeed:"normal",direction:135,keep:true};if(isObject(config)){for(var i in config){if(config.hasOwnProperty(i)){defaultConfig[i]=config[i];}}}
return defaultConfig;};TagCloud._getMsSpeed=function(mspeed){var speedMap={slow:1.5,normal:3,fast:5};return speedMap[mspeed]||3;};TagCloud._getIsSpeed=function(ispeed){var speedMap={slow:10,normal:25,fast:50};return speedMap[ispeed]||25;};TagCloud._getSc=function(a,b){var l=Math.PI/180;return[Math.sin(a*l),Math.cos(a*l),Math.sin(b*l),Math.cos(b*l)];};TagCloud._on=function(ele,eve,handler,cap){if(ele.addEventListener){ele.addEventListener(eve,handler,cap);}else if(ele.attachEvent){ele.attachEvent('on'+eve,handler);}else{ele['on'+eve]=handler;}};TagCloud.prototype={constructor:TagCloud,update:function(){var self=this,a,b;if(!self.active&&!self.keep){self.mouseX=Math.abs(self.mouseX-self.mouseX0)<1?self.mouseX0:(self.mouseX+self.mouseX0)/2;self.mouseY=Math.abs(self.mouseY-self.mouseY0)<1?self.mouseY0:(self.mouseY+self.mouseY0)/2;}
a=-(Math.min(Math.max(-self.mouseY,-self.size),self.size)/self.radius)*self.mspeed;b=(Math.min(Math.max(-self.mouseX,-self.size),self.size)/self.radius)*self.mspeed;if(Math.abs(a)<=0.01&&Math.abs(b)<=0.01){return;}
self.lasta=a;self.lastb=b;var sc=TagCloud._getSc(a,b);for(var j=0,len=self.items.length;j<len;j++){var rx1=self.items[j].x,ry1=self.items[j].y*sc[1]+self.items[j].z*(-sc[0]),rz1=self.items[j].y*sc[0]+self.items[j].z*sc[1];var rx2=rx1*sc[3]+rz1*sc[2],ry2=ry1,rz2=rz1*sc[3]-rx1*sc[2];if(self.index==j){self.items[j].scale=1;self.items[j].fontsize=16;self.items[j].alpha=1;self.items[j].element.style.zIndex=99;}else{var per=self.depth/(self.depth+rz2);self.items[j].x=rx2;self.items[j].y=ry2;self.items[j].z=rz2;self.items[j].scale=per;self.items[j].fontsize=Math.ceil(per*2)+self.fontsize-6;self.items[j].alpha=1.5*per-0.5;self.items[j].element.style.zIndex=Math.ceil(per*10-5);}
self.items[j].element.style.fontSize=self.items[j].fontsize+"px";self.items[j].element.style.left=self.items[j].x+(self.box.offsetWidth-self.items[j].offsetWidth)/2+"px";self.items[j].element.style.top=self.items[j].y+(self.box.offsetHeight-self.items[j].offsetHeight)/2+"px";self.items[j].element.style.filter="alpha(opacity="+100*self.items[j].alpha+")";self.items[j].element.style.opacity=self.items[j].alpha;}},_getItems:function(){var self=this,items=[],element=self.box.children,length=element.length,item;for(var i=0;i<length;i++){item={};item.angle={};item.angle.phi=Math.acos(-1+(2*i+1)/length);item.angle.theta=Math.sqrt((length+1)*Math.PI)*item.angle.phi;item.element=element[i];item.offsetWidth=item.element.offsetWidth;item.offsetHeight=item.element.offsetHeight;item.x=self.radius*1.5*Math.cos(item.angle.theta)*Math.sin(item.angle.phi);item.y=self.radius*1.5*Math.sin(item.angle.theta)*Math.sin(item.angle.phi);item.z=self.radius*1.5*Math.cos(item.angle.phi);item.element.style.left=item.x+(self.box.offsetWidth-item.offsetWidth)/2+"px";item.element.style.top=item.y+(self.box.offsetHeight-item.offsetHeight)/2+"px";items.push(item);}
return items;}};if(!doc.querySelectorAll){doc.querySelectorAll=function(selectors){var style=doc.createElement('style'),elements=[],element;doc.documentElement.firstChild.appendChild(style);doc._qsa=[];style.styleSheet.cssText=selectors+'{x-qsa:expression(document._qsa && document._qsa.push(this))}';window.scrollBy(0,0);style.parentNode.removeChild(style);while(doc._qsa.length){element=doc._qsa.shift();element.style.removeAttribute('x-qsa');elements.push(element);}
doc._qsa=null;return elements;};}
return function(options){options=options||{};var selector=options.selector||'.tagcloud',elements=doc.querySelectorAll(selector),instance=[];for(var index=0,len=elements.length;index<len;index++){options.element=elements[index];if(!!TagCloud._set(options.element)){instance.push(new TagCloud(options));}}
return instance;};})(window,document);