Normalized chart -- cut min and max y values with original minmax. Fixes CHRT-206

c3.js

@@ -3543,7 +3543,7 @@
 
         var data = [];
         
-        data.noNegative = true;
+        data.onlyPositive = true;
 
         targets.forEach(function(target){
             data.push($$.cloneTarget(target));
@@ -3554,7 +3554,7 @@
             for(c in targets) {
                 if(targets[c].values[k]){
                     if(targets[c].values[k].value < 0){
-                        data.noNegative = false;
+                        data.onlyPositive = false;
                     }
                     tt = tt + Math.abs(targets[c].values[k].value);
                 }
@@ -4871,7 +4871,7 @@
         // if we don't need to tune
         if($$.config.normalized){
             $$.data.targets = $$.normalize($$.data._targets);
-            if($$.data.targets.noNegative){
+            if($$.data.targets.onlyPositive){
                 $$.cachedRedraw();
                 return;
             }
@@ -4887,9 +4887,13 @@
             }
             var sizesY = $$.getAxisData(minmax.minY, minmax.maxY);
 
+            
             if($$.config.normalized){
                 sizesY.max = Math.min(sizesY.max, 1);
                 sizesY.min = Math.max(sizesY.min, -1);
+
+                sizesY.max = Math.min(sizesY.max, minmax.maxY);
+                sizesY.min = Math.max(sizesY.min, minmax.minY);
             }
 
             $$.api.axis.range({

src/axis.js

@@ -381,7 +381,7 @@ c3_chart_internal_fn.tuneAxis = function(sync, callback){
     // if we don't need to tune
     if($$.config.normalized){
         $$.data.targets = $$.normalize($$.data._targets);
-        if($$.data.targets.noNegative){
+        if($$.data.targets.onlyPositive){
             $$.cachedRedraw();
             return;
         }
@@ -397,9 +397,13 @@ c3_chart_internal_fn.tuneAxis = function(sync, callback){
         }
         var sizesY = $$.getAxisData(minmax.minY, minmax.maxY);
 
+        
         if($$.config.normalized){
             sizesY.max = Math.min(sizesY.max, 1);
             sizesY.min = Math.max(sizesY.min, -1);
+
+            sizesY.max = Math.min(sizesY.max, minmax.maxY);
+            sizesY.min = Math.max(sizesY.min, minmax.minY);
         }
 
         $$.api.axis.range({

src/stacked.js

@@ -7,7 +7,7 @@ c3.chart.internal.fn.normalize = function(targets){
 
     var data = [];
     
-    data.noNegative = true;
+    data.onlyPositive = true;
 
     targets.forEach(function(target){
         data.push($$.cloneTarget(target));
@@ -18,7 +18,7 @@ c3.chart.internal.fn.normalize = function(targets){
         for(c in targets) {
             if(targets[c].values[k]){
                 if(targets[c].values[k].value < 0){
-                    data.noNegative = false;
+                    data.onlyPositive = false;
                 }
                 tt = tt + Math.abs(targets[c].values[k].value);
             }