Fix axis.y.padding

c3.js

@@ -31,7 +31,10 @@
     function Chart(config) {
         var $$ = this.internal = new ChartInternal(this);
         $$.loadConfig(config);
+
+        $$.beforeInit();
         $$.init();
+        $$.afterInit();
 
         // bind "this" to nested API
         (function bindThis(fn, target, argThis) {
@@ -71,6 +74,12 @@
     c3_chart_internal_fn = c3.chart.internal.fn;
     c3_chart_internal_axis_fn = c3.chart.internal.axis.fn;
 
+    c3_chart_internal_fn.beforeInit = function () {
+        // can do something
+    };
+    c3_chart_internal_fn.afterInit = function () {
+        // can do something
+    };
     c3_chart_internal_fn.init = function () {
         var $$ = this, config = $$.config;
 
@@ -4582,14 +4591,15 @@
             .text(this.textForY2AxisLabel.bind(this));
     };
     Axis.prototype.getPadding = function getPadding(padding, key, defaultValue, domainLength) {
-        if (!isValue(padding[key])) {
+        var p = typeof padding === 'number' ? padding : padding[key];
+        if (!isValue(p)) {
             return defaultValue;
         }
         if (padding.unit === 'ratio') {
             return padding[key] * domainLength;
         }
         // assume padding is pixels if unit is not specified
-        return this.convertPixelsToAxisPadding(padding[key], domainLength);
+        return this.convertPixelsToAxisPadding(p, domainLength);
     };
     Axis.prototype.convertPixelsToAxisPadding = function convertPixelsToAxisPadding(pixels, domainLength) {
         var $$ = this.owner,
@@ -5957,10 +5967,10 @@
             return d[1] - d[0];
         },
         isEmpty = c3_chart_internal_fn.isEmpty = function (o) {
-            return !o || (isString(o) && o.length === 0) || (typeof o === 'object' && Object.keys(o).length === 0);
+            return typeof o === 'undefined' || o === null || (isString(o) && o.length === 0) || (typeof o === 'object' && Object.keys(o).length === 0);
         },
         notEmpty = c3_chart_internal_fn.notEmpty = function (o) {
-            return Object.keys(o).length > 0;
+            return !c3_chart_internal_fn.isEmpty(o);
         },
         getOption = c3_chart_internal_fn.getOption = function (options, key, defaultValue) {
             return isDefined(options[key]) ? options[key] : defaultValue;

spec/domain-spec.js

@@ -80,6 +80,29 @@ describe('c3 chart domain', function () {
     describe('axis.y.padding', function () {
 
         it('should change axis.y.max to 1000', function () {
+            args = {
+                data: {
+                    columns: [
+                        ['data1', 10, 20, 10, 40, 15, 25],
+                        ['data2', 50, 40, 30, 45, 25, 45]
+                    ]
+                },
+                axis: {
+                    y: {
+                        padding: 200,
+                    }
+                }
+            };
+            expect(true).toBeTruthy();
+        });
+
+        it('should be set properly when bigger than min of data', function () {
+            var domain = chart.internal.y.domain();
+            expect(domain[0]).toBeCloseTo(-9, -1);
+            expect(domain[1]).toBeCloseTo(69, -1);
+        });
+
+        it('should change axis.y.max to 1000 with top/bottom padding', function () {
             args = {
                 data: {
                     columns: [

src/axis.js

@@ -321,14 +321,15 @@ Axis.prototype.updateLabels = function updateLabels(withTransition) {
         .text(this.textForY2AxisLabel.bind(this));
 };
 Axis.prototype.getPadding = function getPadding(padding, key, defaultValue, domainLength) {
-    if (!isValue(padding[key])) {
+    var p = typeof padding === 'number' ? padding : padding[key];
+    if (!isValue(p)) {
         return defaultValue;
     }
     if (padding.unit === 'ratio') {
         return padding[key] * domainLength;
     }
     // assume padding is pixels if unit is not specified
-    return this.convertPixelsToAxisPadding(padding[key], domainLength);
+    return this.convertPixelsToAxisPadding(p, domainLength);
 };
 Axis.prototype.convertPixelsToAxisPadding = function convertPixelsToAxisPadding(pixels, domainLength) {
     var $$ = this.owner,

src/util.js

@@ -23,10 +23,10 @@ var isValue = c3_chart_internal_fn.isValue = function (v) {
         return d[1] - d[0];
     },
     isEmpty = c3_chart_internal_fn.isEmpty = function (o) {
-        return !o || (isString(o) && o.length === 0) || (typeof o === 'object' && Object.keys(o).length === 0);
+        return typeof o === 'undefined' || o === null || (isString(o) && o.length === 0) || (typeof o === 'object' && Object.keys(o).length === 0);
     },
     notEmpty = c3_chart_internal_fn.notEmpty = function (o) {
-        return Object.keys(o).length > 0;
+        return !c3_chart_internal_fn.isEmpty(o);
     },
     getOption = c3_chart_internal_fn.getOption = function (options, key, defaultValue) {
         return isDefined(options[key]) ? options[key] : defaultValue;