jquery.tagcloud.js

(function($){$.fn.tagcloud=function(options){var opts=$.extend({},$.fn.tagcloud.defaults,options);tagWeights=this.map(function(){return $(this).attr("rel");});tagWeights=jQuery.makeArray(tagWeights).sort(compareWeights);lowest=tagWeights[0];highest=tagWeights.pop();range=highest- lowest;if(range===0){range=1;}
if(opts.size){fontIncr=(opts.size.end- opts.size.start)/range;
}
if(opts.color){colorIncr=colorIncrement(opts.color,range);}
return this.each(function(){weighting=$(this).attr("rel")- lowest;if(opts.size){$(this).css({"font-size":opts.size.start+(weighting*fontIncr)+ opts.size.unit});}
if(opts.color){$(this).css({"color":tagColor(opts.color,colorIncr,weighting)});}});};$.fn.tagcloud.defaults={size:{start:14,end:18,unit:"pt"}};function toRGB(code){if(code.length==4){code=jQuery.map(/\w+/.exec(code),function(el){return el+ el;}).join("");}
hex=/(\w{2})(\w{2})(\w{2})/.exec(code);return[parseInt(hex[1],16),parseInt(hex[2],16),parseInt(hex[3],16)];}
function toHex(ary){return"#"+ jQuery.map(ary,function(i){hex=i.toString(16);hex=(hex.length==1)?"0"+ hex:hex;return hex;}).join("");}
function colorIncrement(color,range){return jQuery.map(toRGB(color.end),function(n,i){return(n- toRGB(color.start)[i])/range;
});}
function tagColor(color,increment,weighting){rgb=jQuery.map(toRGB(color.start),function(n,i){ref=Math.round(n+(increment[i]*weighting));if(ref>255){ref=255;}else{if(ref<0){ref=0;}}
return ref;});return toHex(rgb);}
function compareWeights(a,b)
{return a- b;}})(jQuery);