[Fiber] Move updatePriority tracking to renderers

Current updatePriority is tracked in the reconciler. `flushSync` is going to be implemented reconciler agnostic soon and we need to move the tracking of this state to the renderer and out of reconciler. This change implements new renderer bin
dings for getCurrentUpdatePriority and setCurrentUpdatePriority.

I was originally going to have the getter also do the event priority defaulting using window.event so we eliminate getCur
rentEventPriority but this makes all the callsites where we store the true current updatePriority on the stack harder to
work with so for now they remain separate.

I also moved runWithPriority to the renderer since it really belongs whereever the state is being managed and it is only
currently exposed in the DOM renderer.

Author: gnoff

packages/react-art/src/ReactFiberConfigART.js

@@ -5,12 +5,17 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+import type {EventPriority} from 'react-reconciler/src/ReactEventPriorities';
+
 import Transform from 'art/core/transform';
 import Mode from 'art/modes/current';
 
 import {TYPES, EVENT_TYPES, childrenAsString} from './ReactARTInternals';
 
-import {DefaultEventPriority} from 'react-reconciler/src/ReactEventPriorities';
+import {
+  DefaultEventPriority,
+  NoEventPriority,
+} from 'react-reconciler/src/ReactEventPriorities';
 
 const pooledTransform = new Transform();
 
@@ -336,6 +341,16 @@ export function shouldSetTextContent(type, props) {
   );
 }
 
+let currentUpdatePriority: EventPriority = NoEventPriority;
+
+export function setCurrentUpdatePriority(newPriority: EventPriority) {
+  currentUpdatePriority = newPriority;
+}
+
+export function getCurrentUpdatePriority() {
+  return currentUpdatePriority;
+}
+
 export function getCurrentEventPriority() {
   return DefaultEventPriority;
 }

packages/react-dom-bindings/src/client/ReactDOMUpdatePriority.js

@@ -0,0 +1,32 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+import type {EventPriority} from 'react-reconciler/src/ReactEventPriorities';
+
+import {NoEventPriority} from 'react-reconciler/src/ReactEventPriorities';
+
+let currentUpdatePriority: EventPriority = NoEventPriority;
+
+export function setCurrentUpdatePriority(newPriority: EventPriority): void {
+  currentUpdatePriority = newPriority;
+}
+
+export function getCurrentUpdatePriority(): EventPriority {
+  return currentUpdatePriority;
+}
+
+export function runWithPriority<T>(priority: EventPriority, fn: () => T): T {
+  const previousPriority = getCurrentUpdatePriority();
+  try {
+    setCurrentUpdatePriority(priority);
+    return fn();
+  } finally {
+    setCurrentUpdatePriority(previousPriority);
+  }
+}

packages/react-dom-bindings/src/client/ReactFiberConfigDOM.js

@@ -34,6 +34,10 @@ import {DefaultEventPriority} from 'react-reconciler/src/ReactEventPriorities';
 import hasOwnProperty from 'shared/hasOwnProperty';
 import {checkAttributeStringCoercion} from 'shared/CheckStringCoercion';
 
+export {
+  setCurrentUpdatePriority,
+  getCurrentUpdatePriority,
+} from './ReactDOMUpdatePriority';
 import {
   precacheFiberNode,
   updateFiberProps,

packages/react-dom-bindings/src/events/ReactDOMEventListener.js

@@ -34,6 +34,10 @@ import {
 } from '../client/ReactDOMComponentTree';
 
 import {dispatchEventForPluginEventSystem} from './DOMPluginEventSystem';
+import {
+  getCurrentUpdatePriority,
+  setCurrentUpdatePriority,
+} from '../client/ReactDOMUpdatePriority';
 
 import {
   getCurrentPriorityLevel as getCurrentSchedulerPriorityLevel,
@@ -48,8 +52,6 @@ import {
   ContinuousEventPriority,
   DefaultEventPriority,
   IdleEventPriority,
-  getCurrentUpdatePriority,
-  setCurrentUpdatePriority,
 } from 'react-reconciler/src/ReactEventPriorities';
 import ReactSharedInternals from 'shared/ReactSharedInternals';
 import {isRootDehydrated} from 'react-reconciler/src/ReactFiberShellHydration';

packages/react-dom-bindings/src/events/ReactDOMEventReplaying.js

@@ -37,15 +37,15 @@ import {HostRoot, SuspenseComponent} from 'react-reconciler/src/ReactWorkTags';
 import {isHigherEventPriority} from 'react-reconciler/src/ReactEventPriorities';
 import {isRootDehydrated} from 'react-reconciler/src/ReactFiberShellHydration';
 import {dispatchReplayedFormAction} from './plugins/FormActionEventPlugin';
+import {
+  getCurrentUpdatePriority,
+  runWithPriority as attemptHydrationAtPriority,
+} from '../client/ReactDOMUpdatePriority';
 
 import {
   attemptContinuousHydration,
   attemptHydrationAtCurrentPriority,
 } from 'react-reconciler/src/ReactFiberReconciler';
-import {
-  runWithPriority as attemptHydrationAtPriority,
-  getCurrentUpdatePriority,
-} from 'react-reconciler/src/ReactEventPriorities';
 
 // TODO: Upgrade this definition once we're on a newer version of Flow that
 // has this definition built-in.

packages/react-dom/src/client/ReactDOM.js

@@ -20,14 +20,14 @@ import {
   isValidContainer,
 } from './ReactDOMRoot';
 import {createEventHandle} from 'react-dom-bindings/src/client/ReactDOMEventHandle';
+import {runWithPriority} from 'react-dom-bindings/src/client/ReactDOMUpdatePriority';
 
 import {
   flushSync as flushSyncWithoutWarningIfAlreadyRendering,
   isAlreadyRendering,
   injectIntoDevTools,
   findHostInstance,
 } from 'react-reconciler/src/ReactFiberReconciler';
-import {runWithPriority} from 'react-reconciler/src/ReactEventPriorities';
 import {createPortal as createPortalImpl} from 'react-reconciler/src/ReactPortal';
 import {canUseDOM} from 'shared/ExecutionEnvironment';
 import ReactVersion from 'shared/ReactVersion';

packages/react-native-renderer/src/ReactFiberConfigFabric.js

@@ -15,6 +15,7 @@ import type {
 import {create, diff} from './ReactNativeAttributePayload';
 import {dispatchEvent} from './ReactFabricEventEmitter';
 import {
+  NoEventPriority,
   DefaultEventPriority,
   DiscreteEventPriority,
   type EventPriority,
@@ -311,6 +312,17 @@ export function shouldSetTextContent(type: string, props: Props): boolean {
   return false;
 }
 
+let currentUpdatePriority: EventPriority = NoEventPriority;
+export function setCurrentUpdatePriority(
+  newEventPriority: EventPriority,
+): void {
+  currentUpdatePriority = newEventPriority;
+}
+
+export function getCurrentUpdatePriority(): EventPriority {
+  return currentUpdatePriority;
+}
+
 export function getCurrentEventPriority(): EventPriority {
   const currentEventPriority = fabricGetCurrentEventPriority
     ? fabricGetCurrentEventPriority()

packages/react-native-renderer/src/ReactFiberConfigNative.js

@@ -26,6 +26,7 @@ import ReactNativeFiberHostComponent from './ReactNativeFiberHostComponent';
 
 import {
   DefaultEventPriority,
+  NoEventPriority,
   type EventPriority,
 } from 'react-reconciler/src/ReactEventPriorities';
 import type {Fiber} from 'react-reconciler/src/ReactInternalTypes';
@@ -253,6 +254,15 @@ export function shouldSetTextContent(type: string, props: Props): boolean {
   return false;
 }
 
+let currentUpdatePriority: EventPriority = NoEventPriority;
+export function setCurrentUpdatePriority(newPriority: EventPriority): void {
+  currentUpdatePriority = newPriority;
+}
+
+export function getCurrentUpdatePriority(): EventPriority {
+  return currentUpdatePriority;
+}
+
 export function getCurrentEventPriority(): EventPriority {
   return DefaultEventPriority;
 }

packages/react-noop-renderer/src/createReactNoop.js

@@ -21,12 +21,14 @@ import type {
 import type {UpdateQueue} from 'react-reconciler/src/ReactFiberClassUpdateQueue';
 import type {ReactNodeList} from 'shared/ReactTypes';
 import type {RootTag} from 'react-reconciler/src/ReactRootTags';
+import type {EventPriority} from 'react-reconciler/src/ReactEventPriorities';
 
 import * as Scheduler from 'scheduler/unstable_mock';
 import {REACT_FRAGMENT_TYPE, REACT_ELEMENT_TYPE} from 'shared/ReactSymbols';
 import isArray from 'shared/isArray';
 import {checkPropStringCoercion} from 'shared/CheckStringCoercion';
 import {
+  NoEventPriority,
   DefaultEventPriority,
   IdleEventPriority,
   ConcurrentRoot,
@@ -508,6 +510,9 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {
 
     resetAfterCommit(): void {},
 
+    setCurrentUpdatePriority,
+    getCurrentUpdatePriority,
+
     getCurrentEventPriority() {
       return currentEventPriority;
     },
@@ -782,6 +787,15 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {
   const roots = new Map();
   const DEFAULT_ROOT_ID = '<default>';
 
+  let currentUpdatePriority = NoEventPriority;
+  function setCurrentUpdatePriority(newPriority: EventPriority): void {
+    currentUpdatePriority = newPriority;
+  }
+
+  function getCurrentUpdatePriority(): EventPriority {
+    return currentUpdatePriority;
+  }
+
   let currentEventPriority = DefaultEventPriority;
 
   function createJSXElementForTestComparison(type, props) {
@@ -1211,7 +1225,18 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {
       return Scheduler.unstable_flushExpired();
     },
 
-    unstable_runWithPriority: NoopRenderer.runWithPriority,
+    unstable_runWithPriority: function runWithPriority<T>(
+      priority: EventPriority,
+      fn: () => T,
+    ): T {
+      const previousPriority = getCurrentUpdatePriority();
+      try {
+        setCurrentUpdatePriority(priority);
+        return fn();
+      } finally {
+        setCurrentUpdatePriority(previousPriority);
+      }
+    },
 
     batchedUpdates: NoopRenderer.batchedUpdates,
 

packages/react-reconciler/src/ReactEventPriorities.js

@@ -21,31 +21,12 @@ import {
 
 export opaque type EventPriority = Lane;
 
+export const NoEventPriority: EventPriority = NoLane;
 export const DiscreteEventPriority: EventPriority = SyncLane;
 export const ContinuousEventPriority: EventPriority = InputContinuousLane;
 export const DefaultEventPriority: EventPriority = DefaultLane;
 export const IdleEventPriority: EventPriority = IdleLane;
 
-let currentUpdatePriority: EventPriority = NoLane;
-
-export function getCurrentUpdatePriority(): EventPriority {
-  return currentUpdatePriority;
-}
-
-export function setCurrentUpdatePriority(newPriority: EventPriority) {
-  currentUpdatePriority = newPriority;
-}
-
-export function runWithPriority<T>(priority: EventPriority, fn: () => T): T {
-  const previousPriority = currentUpdatePriority;
-  try {
-    currentUpdatePriority = priority;
-    return fn();
-  } finally {
-    currentUpdatePriority = previousPriority;
-  }
-}
-
 export function higherEventPriority(
   a: EventPriority,
   b: EventPriority,