Added property display: flex and none

Summary:
Fix #241 and successor for #302

Added new property ```display``` with ```YGDisplayFlex``` and ```YGDisplayNone```. Allows to hide nodes from the layout without the need to remove it from the DOM.
Closes https://github.com/facebook/yoga/pull/369

Reviewed By: astreet

Differential Revision: D4501141

Pulled By: emilsjolander

fbshipit-source-id: 0dfeee381f6d1e4bbba81926126b83dd7abab9d6

java/com/facebook/yoga/YogaDisplay.java

@@ -0,0 +1,36 @@
+/**
+ * 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.
+ */
+
+package com.facebook.yoga;
+
+import com.facebook.proguard.annotations.DoNotStrip;
+
+@DoNotStrip
+public enum YogaDisplay {
+  FLEX(0),
+  NONE(1);
+
+  private int mIntValue;
+
+  YogaDisplay(int intValue) {
+    mIntValue = intValue;
+  }
+
+  public int intValue() {
+    return mIntValue;
+  }
+
+  public static YogaDisplay fromInt(int value) {
+    switch (value) {
+      case 0: return FLEX;
+      case 1: return NONE;
+      default: throw new IllegalArgumentException("Unknown enum value: " + value);
+    }
+  }
+}

java/com/facebook/yoga/YogaNode.java

@@ -310,6 +310,18 @@ public class YogaNode implements YogaNodeAPI<YogaNode> {
     jni_YGNodeStyleSetOverflow(mNativePointer, overflow.intValue());
   }
 
+  private native int jni_YGNodeStyleGetDisplay(long nativePointer);
+  @Override
+  public YogaDisplay getDisplay() {
+    return YogaDisplay.fromInt(jni_YGNodeStyleGetDisplay(mNativePointer));
+  }
+
+  private native void jni_YGNodeStyleSetDisplay(long nativePointer, int display);
+  @Override
+  public void setDisplay(YogaDisplay display) {
+    jni_YGNodeStyleSetDisplay(mNativePointer, display.intValue());
+  }
+
   private native void jni_YGNodeStyleSetFlex(long nativePointer, float flex);
   @Override
   public void setFlex(float flex) {

java/com/facebook/yoga/YogaNodeAPI.java

@@ -87,6 +87,8 @@ public interface YogaNodeAPI<YogaNodeType extends YogaNodeAPI> {
   YogaDirection getLayoutDirection();
   YogaOverflow getOverflow();
   void setOverflow(YogaOverflow overflow);
+  YogaDisplay getDisplay();
+  void setDisplay(YogaDisplay display);
   void setData(Object data);
   Object getData();
   void reset();