From f1b5fe1d3ea49294d8c89accfa27d76a1a97ccea Mon Sep 17 00:00:00 2001
From: Lulu Wu <luluwu@fb.com>
Date: Sun, 17 Oct 2021 02:53:44 -0700
Subject: [PATCH] Prevent NPE on ThemedReactContext

Summary:
When pre-prerendering a surface without rendering it, "SurfaceMountingManager.getContext()" will return null since no ThemedReactContext is passed into it:
https://www.internalfb.com/code/fbsource/[0f4812c8039d975b3651dfa756d60a882bf8e193]/xplat/js/react-native-github/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java?lines=298-317

Changelog:
[Android][Fixed] - Prevent NPE on ThemedReactContext

Reviewed By: ShikaSD

Differential Revision: D31691022

fbshipit-source-id: 4cca6c4550a77075f8fd754dbf21fe5bf5da77e6
---
 .../main/java/com/facebook/react/fabric/FabricUIManager.java | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java b/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java
index 270b9466b0d387..a161270395222b 100644
--- a/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java
+++ b/ReactAndroid/src/main/java/com/facebook/react/fabric/FabricUIManager.java
@@ -559,6 +559,11 @@ public boolean getThemeData(int surfaceId, float[] defaultTextInputPadding) {
     SurfaceMountingManager surfaceMountingManager =
         mMountingManager.getSurfaceManagerEnforced(surfaceId, "getThemeData");
     ThemedReactContext themedReactContext = surfaceMountingManager.getContext();
+
+    if (themedReactContext == null) {
+      FLog.w(TAG, "\"themedReactContext\" is null when call \"getThemeData\"");
+      return false;
+    }
     float[] defaultTextInputPaddingForTheme =
         UIManagerHelper.getDefaultTextInputPadding(themedReactContext);
     defaultTextInputPadding[0] = defaultTextInputPaddingForTheme[PADDING_START_INDEX];