Partly fix bug with sub-charts in nodejs

c3.js

@@ -4750,8 +4750,8 @@
         if(sync){
             apply();
         } else {
-            $$.buffer.onlastfinish("tune-axis", apply);
-            $$.buffer.onlastfinish("cached-redraw", function(){});
+            $$.buffer.onlastfinish("tune-axis" + $$.config.isSub, apply);
+            $$.buffer.onlastfinish("cached-redraw" + $$.config.isSub, function(){});
         }
 
     };
@@ -4806,7 +4806,7 @@
                 axis = $$.getAxisData(min, max, true);
                 break;
             default:
-                throw new Error("Unsupported type for axis");
+                throw new Error("Unsupported type for axis " + type);
         }
         return axis;
     };
@@ -5401,7 +5401,7 @@
             .style("opacity", $$.hasType('donut') || $$.hasType('gauge') ? 1 : 0);
 
         if($$.config.hasSubs || $$.config.isSub){
-            $$.buffer.onlastfinish("draw-lines", function(){
+            $$.buffer.onlastfinish("draw-lines"+$$.config.isSub, function(){
                 $$.ed3Internal.redrawLinesOnBoth();
                 $$.ed3Internal.redrawLinesOnBoth();
             });
@@ -6143,8 +6143,8 @@
         $$.pushCallback(callback);
 
         if($$.config.shouldCache){
-            if(!$$.buffer.has("tune-axis")){
-                $$.buffer.onlastfinish("cached-redraw",
+            if(!$$.buffer.has("tune-axis" + $$.config.isSub)){
+                $$.buffer.onlastfinish("cached-redraw" + $$.config.isSub,
                     function(){
                         $$.resolveDraw(options);
                     }
@@ -6492,7 +6492,7 @@
 
             $$.ed3Config.subBox = $$.getBox($$.main.selectAll(".sub-chart .c3-chart-bars"));
 
-            if(!$$.ed3Config.coords[order]) return;
+            if(isUndefined($$.ed3Config.coords[order])) return;
 
             var coords = $$.ed3Config.coords[order];
 
@@ -6526,10 +6526,6 @@
                 y1 = center.y + $$.radius * (small ? Math.cos($$.config.angle) : 1);
             }
 
-            if(!$$.ed3Config.coords){
-                $$.ed3Config.coords = {};
-            }
-
             if(!$$.ed3Config.subBox) return; 
 
             x2 = $$.ed3Config.subBox.x + $$.getCurrentWidth();
@@ -6564,7 +6560,7 @@
 
         if(isSub($$.config.ed3Type)){
 
-            if(!$$.ed3Config.coords) return;
+            if(!$$.ed3Config.coords[order]) return;
 
             var coords = $$.ed3Config.coords[order];
 
@@ -6600,10 +6596,6 @@
                 y2 = center.y + $$.radius;
             }
 
-            if(!$$.ed3Config.coords){
-                $$.ed3Config.coords = {};
-            }
-
             if(small){
                 var subCenter = {
                     x: center.x + $$.getCurrentWidth(),

src/arc.js

@@ -305,7 +305,7 @@ c3_chart_internal_fn.redrawArc = function (duration, durationForExit, withTransf
         .style("opacity", $$.hasType('donut') || $$.hasType('gauge') ? 1 : 0);
 
     if($$.config.hasSubs || $$.config.isSub){
-        $$.buffer.onlastfinish("draw-lines", function(){
+        $$.buffer.onlastfinish("draw-lines"+$$.config.isSub, function(){
             $$.ed3Internal.redrawLinesOnBoth();
             $$.ed3Internal.redrawLinesOnBoth();
         });

src/axis.js

@@ -411,8 +411,8 @@ c3_chart_internal_fn.tuneAxis = function(sync, callback){
     if(sync){
         apply();
     } else {
-        $$.buffer.onlastfinish("tune-axis", apply);
-        $$.buffer.onlastfinish("cached-redraw", function(){});
+        $$.buffer.onlastfinish("tune-axis" + $$.config.isSub, apply);
+        $$.buffer.onlastfinish("cached-redraw" + $$.config.isSub, function(){});
     }
 
 };
@@ -467,7 +467,7 @@ c3_chart_internal_fn.getAbscissa =  function(type, min, max) {
             axis = $$.getAxisData(min, max, true);
             break;
         default:
-            throw new Error("Unsupported type for axis");
+            throw new Error("Unsupported type for axis " + type);
     }
     return axis;
 };

src/callbacks.js

@@ -39,8 +39,8 @@ c3.chart.internal.fn.cachedRedraw = function(options, callback){
     $$.pushCallback(callback);
 
     if($$.config.shouldCache){
-        if(!$$.buffer.has("tune-axis")){
-            $$.buffer.onlastfinish("cached-redraw",
+        if(!$$.buffer.has("tune-axis" + $$.config.isSub)){
+            $$.buffer.onlastfinish("cached-redraw" + $$.config.isSub,
                 function(){
                     $$.resolveDraw(options);
                 }

src/lines.js

@@ -35,7 +35,7 @@ c3.chart.internal.fn.getLineCoordsForBar = function(center, order){
 
         $$.ed3Config.subBox = $$.getBox($$.main.selectAll(".sub-chart .c3-chart-bars"));
 
-        if(!$$.ed3Config.coords[order]) return;
+        if(isUndefined($$.ed3Config.coords[order])) return;
 
         var coords = $$.ed3Config.coords[order];
 
@@ -69,10 +69,6 @@ c3.chart.internal.fn.getLineCoordsForBar = function(center, order){
             y1 = center.y + $$.radius * (small ? Math.cos($$.config.angle) : 1);
         }
 
-        if(!$$.ed3Config.coords){
-            $$.ed3Config.coords = {};
-        }
-
         if(!$$.ed3Config.subBox) return; 
 
         x2 = $$.ed3Config.subBox.x + $$.getCurrentWidth();
@@ -107,7 +103,7 @@ c3.chart.internal.fn.getLineCoordsForPie = function(center, order){
 
     if(isSub($$.config.ed3Type)){
 
-        if(!$$.ed3Config.coords) return;
+        if(!$$.ed3Config.coords[order]) return;
 
         var coords = $$.ed3Config.coords[order];
 
@@ -143,10 +139,6 @@ c3.chart.internal.fn.getLineCoordsForPie = function(center, order){
             y2 = center.y + $$.radius;
         }
 
-        if(!$$.ed3Config.coords){
-            $$.ed3Config.coords = {};
-        }
-
         if(small){
             var subCenter = {
                 x: center.x + $$.getCurrentWidth(),