Implement Legacy measure API on Fabric

Summary: This diff exposes the legacy measure() method on Fabric. This method will be replaced by getRelativeLayoutMetrics in the future, but we are exposing this in order to make Fabric migration easier.

Reviewed By: JoshuaGross, shergin

Differential Revision: D16432928

fbshipit-source-id: 25cc21fb48ec0749081f112af9230bfe53314d6b

Author: mdvacca

ReactCommon/fabric/uimanager/UIManagerBinding.cpp

@@ -421,6 +421,34 @@ jsi::Value UIManagerBinding::get(
         });
   }
 
+  if (methodName == "measure") {
+    return jsi::Function::createFromHostFunction(
+        runtime,
+        name,
+        2,
+        [&uiManager](
+            jsi::Runtime &runtime,
+            const jsi::Value &thisValue,
+            const jsi::Value *arguments,
+            size_t count) -> jsi::Value {
+          auto layoutMetrics = uiManager.getRelativeLayoutMetrics(
+              *shadowNodeFromValue(runtime, arguments[0]), nullptr);
+          auto frame = layoutMetrics.frame;
+          auto onSuccessFunction =
+              arguments[1].getObject(runtime).getFunction(runtime);
+
+          onSuccessFunction.call(
+              runtime,
+              {0,
+               0,
+               jsi::Value{runtime, (double)frame.origin.x},
+               jsi::Value{runtime, (double)frame.origin.y},
+               jsi::Value{runtime, (double)frame.size.width},
+               jsi::Value{runtime, (double)frame.size.height}});
+          return jsi::Value::undefined();
+        });
+  }
+
   if (methodName == "measureInWindow") {
     return jsi::Function::createFromHostFunction(
         runtime,