Move configuration to new YGConfig and pass them down to CalculateLayout

Summary:
Move configuration to new ```YGConfig``` and pass them down to CalculateLayout. See #418 .

Adds ```YGConfigNew()``` + ```YGConfigFree```, and changed ```YGSetExperimentalFeatureEnabled``` to use the config.

New function for calculation is ```YGNodeCalculateLayoutWithConfig```.
Closes https://github.com/facebook/yoga/pull/432

Reviewed By: astreet

Differential Revision: D4611359

Pulled By: emilsjolander

fbshipit-source-id: a1332f0e1b21cec02129dd021ee57408449e10b0

javascript/sources/Config.hh

@@ -0,0 +1,49 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#pragma once
+
+#include <nbind/api.h>
+#include <nbind/BindDefiner.h>
+#include <yoga/Yoga.h>
+
+class Config {
+private:
+  YGConfigRef m_config;
+
+  Config(void)
+  : m_config(YGConfigNew())
+  {}
+
+public:
+
+  static Config * create(void)
+  {
+    return new Config();
+  }
+
+  static void destroy(Config * config)
+  {
+    delete config;
+  }
+
+  ~Config(void)
+  {
+    YGConfigFree(m_config);
+  }
+
+  void setExperimentalFeatureEnabled(int feature, bool enabled)
+  {
+    YGConfigSetExperimentalFeatureEnabled(m_config, static_cast<YGExperimentalFeature>(feature), enabled);
+  }
+
+  Config(Config const &) = delete;
+
+  Config const & operator=(Config const &) = delete;
+};

javascript/sources/Node.cc

@@ -14,6 +14,7 @@
 #include "./Node.hh"
 #include "./Layout.hh"
 #include "./Size.hh"
+#include "./Config.hh"
 
 static YGSize globalMeasureFunc(YGNodeRef nodeRef, float width, YGMeasureMode widthMode, float height, YGMeasureMode heightMode)
 {

javascript/sources/Node.hh

@@ -18,12 +18,14 @@
 #include "./Layout.hh"
 #include "./Size.hh"
 #include "./Value.hh"
+#include "./Config.hh"
 
 class Node {
 
  public:
 
     static Node * create(void);
+    static Node * create(Config * config);
     static void destroy(Node * node);
 
  public:

javascript/sources/global.cc

@@ -11,16 +11,6 @@
 
 #include "./global.hh"
 
-void setExperimentalFeatureEnabled(int feature, bool enabled)
-{
-    YGSetExperimentalFeatureEnabled(static_cast<YGExperimentalFeature>(feature), enabled);
-}
-
-bool isExperimentalFeatureEnabled(int feature)
-{
-    return YGIsExperimentalFeatureEnabled(static_cast<YGExperimentalFeature>(feature));
-}
-
 unsigned getInstanceCount(void)
 {
     return YGNodeGetInstanceCount();

javascript/sources/global.hh

@@ -9,7 +9,4 @@
 
 #pragma once
 
-void setExperimentalFeatureEnabled(int feature, bool enabled);
-bool isExperimentalFeatureEnabled(int feature);
-
 unsigned getInstanceCount(void);

javascript/sources/nbind.cc

@@ -13,6 +13,7 @@
 #include "./Layout.hh"
 #include "./Size.hh"
 #include "./Value.hh"
+#include "./Config.hh"
 #include "./global.hh"
 
 #define NBIND_DUPLICATE_POINTERS true
@@ -21,8 +22,6 @@
 
 NBIND_GLOBAL()
 {
-    function(setExperimentalFeatureEnabled);
-    function(isExperimentalFeatureEnabled);
     function(getInstanceCount);
 }
 
@@ -43,6 +42,13 @@ NBIND_CLASS(Value)
     construct<int, double>();
 }
 
+NBIND_CLASS(Config)
+{
+    method(create);
+    method(destroy);
+    method(setExperimentalFeatureEnabled);
+}
+
 NBIND_CLASS(Node)
 {
     method(create);