Expose layout border to java

Summary: Expose layout border to java

Reviewed By: astreet

Differential Revision: D4543284

fbshipit-source-id: 6030915fc6f758e785a688f94c8ffbec7fbac8b8

java/com/facebook/yoga/YogaNode.java

@@ -86,6 +86,14 @@ public class YogaNode implements YogaNodeAPI<YogaNode> {
   @DoNotStrip
   private float mPaddingBottom = 0;
   @DoNotStrip
+  private float mBorderLeft = 0;
+  @DoNotStrip
+  private float mBorderTop = 0;
+  @DoNotStrip
+  private float mBorderRight = 0;
+  @DoNotStrip
+  private float mBorderBottom = 0;
+  @DoNotStrip
   private int mLayoutDirection = 0;
 
   private native long jni_YGNodeNew();
@@ -633,6 +641,26 @@ public class YogaNode implements YogaNodeAPI<YogaNode> {
     }
   }
 
+  @Override
+  public float getLayoutBorder(YogaEdge edge) {
+    switch (edge) {
+      case LEFT:
+        return mBorderLeft;
+      case TOP:
+        return mBorderTop;
+      case RIGHT:
+        return mBorderRight;
+      case BOTTOM:
+        return mBorderBottom;
+      case START:
+        return getLayoutDirection() == YogaDirection.RTL ? mBorderRight : mBorderLeft;
+      case END:
+        return getLayoutDirection() == YogaDirection.RTL ? mBorderLeft : mBorderRight;
+      default:
+        throw new IllegalArgumentException("Cannot get layout border of multi-edge shorthands");
+    }
+  }
+
   @Override
   public YogaDirection getLayoutDirection() {
     return YogaDirection.fromInt(mLayoutDirection);

java/com/facebook/yoga/YogaNodeAPI.java

@@ -84,6 +84,7 @@ public interface YogaNodeAPI<YogaNodeType extends YogaNodeAPI> {
   float getLayoutHeight();
   float getLayoutMargin(YogaEdge edge);
   float getLayoutPadding(YogaEdge edge);
+  float getLayoutBorder(YogaEdge edge);
   YogaDirection getLayoutDirection();
   YogaOverflow getOverflow();
   void setOverflow(YogaOverflow overflow);