From fb85e904879059fda6ed4e656c1860c34359e59f Mon Sep 17 00:00:00 2001
From: Valentin Shergin <shergin@fb.com>
Date: Mon, 6 May 2019 17:01:14 -0700
Subject: [PATCH] Fabric: Using `LayoutableShadowNode::getTransform` in
 measuring

Summary: After this change, all measuring operations based on `LayoutableShadowNode::getRelativeLayoutMetrics` will take into account the transformation matrices provided by shadow nodes. This will allow implementing scroll-offset-aware and custom-transform-aware measuring.

Reviewed By: JoshuaGross, mdvacca

Differential Revision: D15219259

fbshipit-source-id: 1d7cd8c0ee4406f4dd0002cd442dc0679391922b
---
 ReactCommon/fabric/core/layout/LayoutableShadowNode.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ReactCommon/fabric/core/layout/LayoutableShadowNode.cpp b/ReactCommon/fabric/core/layout/LayoutableShadowNode.cpp
index 26f7633d5c5..81cc956c9a7 100644
--- a/ReactCommon/fabric/core/layout/LayoutableShadowNode.cpp
+++ b/ReactCommon/fabric/core/layout/LayoutableShadowNode.cpp
@@ -64,8 +64,10 @@ LayoutMetrics LayoutableShadowNode::getRelativeLayoutMetrics(
       return EmptyLayoutMetrics;
     }
 
-    layoutMetrics.frame.origin +=
-        layoutableCurrentShadowNode->getLayoutMetrics().frame.origin;
+    auto origin = layoutableCurrentShadowNode->getLayoutMetrics().frame.origin;
+    auto transform = layoutableCurrentShadowNode->getTransform();
+
+    layoutMetrics.frame.origin += origin * transform;
   }
 
   return layoutMetrics;