Misc refactoring of parseFont()

lib/canvas.js

@@ -109,15 +109,20 @@ function normalizedColor(prop) {
 
 var parseFont = exports.parseFont = function(str){
   if (cache[str]) return cache[str];
-  var obj = {}
+  var font = {}
     , captures = fontre.exec(str);
+
+  // Invalid
   if (!captures) return;
-  obj.weight = captures[1] || 'normal';
-  obj.style = captures[2] || 'normal';
-  obj.size = parseInt(captures[3], 10);
-  obj.unit = captures[4];
-  obj.family = captures[5];
-  return cache[str] = obj;
+
+  // Populate font object
+  font.weight = captures[1] || 'normal';
+  font.style = captures[2] || 'normal';
+  font.size = parseInt(captures[3], 10);
+  font.unit = captures[4];
+  font.family = captures[5];
+
+  return cache[str] = font;
 };
 
 /**