Update c3.js and c3.min.js

c3.js

@@ -219,9 +219,14 @@
     };
 
 
+    var __filename; // used in Node.js to get css file using path
+    var c3_chart_fn, c3_chart_internal_fn;
     var c3 = { version: "0.4.9" };
 
-    var c3_chart_fn, c3_chart_internal_fn;
+    var c3init = function(module){
+        __filename = module.uri;
+        return c3;
+    }
 
     function Chart(config) {
         var $$ = this.internal = new ChartInternal(this);
@@ -264,9 +269,52 @@
     c3_chart_internal_fn = c3.chart.internal.fn;
 
 
+    var nodeCss;
+    var styleCache = {};
+
     // Seek a specific value in the stylesheets of a document
-    function getStyleValue(selector, property) {
+    function getStyleValue($$, selector, property) {
+        function cache(value){
+            if(!styleCache[selector]){
+                styleCache[selector] = {};
+            }
+            styleCache[selector][property] = value.trim();
+            return styleCache[selector][property];
+        }
+
+        if(styleCache[selector] && styleCache[selector][property]){
+            return styleCache[selector][property];
+        }
+
         var css, rule, sheet, value;
+        if(isNode()){
+            if(!nodeCss){
+                var style = require('fs').readFileSync(__filename.replace('c3.js', 'c3.css'), 'utf-8');
+                nodeCss = [require('css').parse(style), require('css').parse($$.ed3Config.style)];
+            }
+
+            var obj, rule, sel, decl;
+
+            for(var i = 0; i<nodeCss.length; i++){
+                obj = nodeCss[i];
+                for(var j = 0; j<obj.stylesheet.rules.length; j++){
+                    rule = obj.stylesheet.rules[j];
+                    if(!rule.selectors) continue;
+                    for(var k = 0; k<rule.selectors.length; k++){
+                        sel = rule.selectors[k];
+                        for(var l = 0; l<rule.declarations.length; l++){
+                            decl = rule.declarations[l];
+                            if(decl.property === property){
+                                return cache(decl.value);
+                            }
+                        }
+                    }
+                }
+            }
+
+            console.log('Style not found: ', selector, '->', property);
+            return undefined;
+        }
         for (var styleId = 0; styleId < document.styleSheets.length; styleId++) {
             sheet = document.styleSheets[styleId];
             for (var ruleId = 0; ruleId < sheet.cssRules.length; ruleId++) {
@@ -276,7 +324,7 @@
                     if (css.indexOf(property) !== -1) {
                         try {
                             value = css.split(property)[1].split(':')[1].split(';')[0];
-                            return value.trim();
+                            return cache(value);
                         } catch (e) {
                             // Error will be caught in case of incorrect CSS
                             return undefined;
@@ -3610,7 +3658,7 @@
         ];
     };
     c3_chart_internal_fn.getTextRect = function (text, cls) {
-        var fontSize = parseFloat(getStyleValue(cls, 'font-size'));
+        var fontSize = parseFloat(getStyleValue(this, cls, 'font-size'));
             
         return {
             height: fontSize,
@@ -4236,7 +4284,7 @@
         var hasFocused = $$.legend.selectAll('.' + CLASS.legendItemFocused).size();
         var texts, rects, tiles, background;
 
-        var nodeOffset = isNode() ? 3 : 1;
+        var nodeOffset = 1;
 
         options = options || {};
         withTransition = getOption(options, "withTransition", true);
@@ -8183,7 +8231,7 @@
                 tspan.enter().append('tspan');
                 tspan.exit().remove();
 
-                var fontSize = parseFloat(getStyleValue('.c3-axis-y .tick', 'font-size'));
+                var fontSize = parseFloat(getStyleValue($$, '.c3-axis-y .tick', 'font-size'));
                     
                 tspan.text(function (d) {
                     if (d.splitted.length) {
@@ -8316,7 +8364,7 @@
     };
 
     if (typeof define === 'function' && define.amd) {
-        define("c3", ["d3"], c3);
+        define("c3", ["module", "d3"], c3init);
     } else if ('undefined' !== typeof exports && 'undefined' !== typeof module) {
         module.exports = c3;
     } else {