[init] initial commit

js/jquery.tagcloud.js

@@ -0,0 +1,81 @@
+(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;}
+    // Sizes
+    if (opts.size) {
+      fontIncr = (opts.size.end - opts.size.start)/range;
+    }
+    // Colors
+    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) {
+        // change color to background-color
+        $(this).css({"backgroundColor": tagColor(opts.color, colorIncr, weighting)});
+      }
+    });
+  };
+
+  $.fn.tagcloud.defaults = {
+    size: {start: 14, end: 18, unit: "pt"}
+  };
+
+  // Converts hex to an RGB array
+  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)];
+  }
+
+  // Converts an RGB array to hex
+  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);