From d594d5a4e5b446d7e80e246d0b48fcb1a0d9679b Mon Sep 17 00:00:00 2001
From: Valentin Shergin <shergin@fb.com>
Date: Tue, 27 Nov 2018 18:01:01 -0800
Subject: [PATCH] Fabric: `UIManagerBinding::getRelativeLayoutMetrics`

Summary: Exposing the getRelativeLayoutMetrics method to JS.

Reviewed By: mdvacca

Differential Revision: D13036552

fbshipit-source-id: de825dfde8e64163168510aea1eda77370753b29
---
 .../fabric/uimanager/UIManagerBinding.cpp     | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/ReactCommon/fabric/uimanager/UIManagerBinding.cpp b/ReactCommon/fabric/uimanager/UIManagerBinding.cpp
index 6c460e973..c26f3b20e 100644
--- a/ReactCommon/fabric/uimanager/UIManagerBinding.cpp
+++ b/ReactCommon/fabric/uimanager/UIManagerBinding.cpp
@@ -281,6 +281,29 @@ jsi::Value UIManagerBinding::get(
         });
   }
 
+  if (methodName == "getRelativeLayoutMetrics") {
+    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]),
+              shadowNodeFromValue(runtime, arguments[1]).get());
+          auto frame = layoutMetrics.frame;
+          auto result = jsi::Object(runtime);
+          result.setProperty(runtime, "left", frame.origin.x);
+          result.setProperty(runtime, "top", frame.origin.y);
+          result.setProperty(runtime, "width", frame.size.width);
+          result.setProperty(runtime, "height", frame.size.height);
+          return result;
+        });
+  }
+
   return jsi::Value::undefined();
 }