From d7a7ac1160f31c518b2203e9b567c67985033edb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rub=C3=A9n=20Norte?= <rubennorte@meta.com>
Date: Thu, 10 Apr 2025 15:21:40 +0100
Subject: [PATCH] [RN] Map Fabric priorities to reconciler priorities correctly

---
 .../react-native-renderer/src/ReactFiberConfigFabric.js   | 8 ++++++++
 scripts/flow/react-native-host-hooks.js                   | 2 ++
 2 files changed, 10 insertions(+)

diff --git a/packages/react-native-renderer/src/ReactFiberConfigFabric.js b/packages/react-native-renderer/src/ReactFiberConfigFabric.js
index d0ddc5f7f0dc..151cd3c8cc2a 100644
--- a/packages/react-native-renderer/src/ReactFiberConfigFabric.js
+++ b/packages/react-native-renderer/src/ReactFiberConfigFabric.js
@@ -18,6 +18,8 @@ import {
   NoEventPriority,
   DefaultEventPriority,
   DiscreteEventPriority,
+  ContinuousEventPriority,
+  IdleEventPriority,
   type EventPriority,
 } from 'react-reconciler/src/ReactEventPriorities';
 import type {Fiber} from 'react-reconciler/src/ReactInternalTypes';
@@ -46,6 +48,8 @@ const {
   registerEventHandler,
   unstable_DefaultEventPriority: FabricDefaultPriority,
   unstable_DiscreteEventPriority: FabricDiscretePriority,
+  unstable_ContinuousEventPriority: FabricContinuousPriority,
+  unstable_IdleEventPriority: FabricIdlePriority,
   unstable_getCurrentEventPriority: fabricGetCurrentEventPriority,
 } = nativeFabricUIManager;
 
@@ -397,6 +401,10 @@ export function resolveUpdatePriority(): EventPriority {
     switch (currentEventPriority) {
       case FabricDiscretePriority:
         return DiscreteEventPriority;
+      case FabricContinuousPriority:
+        return ContinuousEventPriority;
+      case FabricIdlePriority:
+        return IdleEventPriority;
       case FabricDefaultPriority:
       default:
         return DefaultEventPriority;
diff --git a/scripts/flow/react-native-host-hooks.js b/scripts/flow/react-native-host-hooks.js
index 78fa4891c1bf..840450b79cdb 100644
--- a/scripts/flow/react-native-host-hooks.js
+++ b/scripts/flow/react-native-host-hooks.js
@@ -277,6 +277,8 @@ declare const nativeFabricUIManager: {
   ) => void,
   unstable_DefaultEventPriority: number,
   unstable_DiscreteEventPriority: number,
+  unstable_ContinuousEventPriority: number,
+  unstable_IdleEventPriority: number,
   unstable_getCurrentEventPriority: () => number,
   ...
 };