Add a host config method

packages/react-art/src/ReactARTHostConfig.js

@@ -7,10 +7,18 @@
 
 import Transform from 'art/core/transform';
 import Mode from 'art/modes/current';
+import {enableNewReconciler} from 'shared/ReactFeatureFlags';
 import invariant from 'shared/invariant';
 
 import {TYPES, EVENT_TYPES, childrenAsString} from './ReactARTInternals';
 
+import {DefaultLanePriority as DefaultLanePriority_old} from 'react-reconciler/src/ReactFiberLane.old';
+import {DefaultLanePriority as DefaultLanePriority_new} from 'react-reconciler/src/ReactFiberLane.new';
+
+const DefaultLanePriority = enableNewReconciler
+  ? DefaultLanePriority_new
+  : DefaultLanePriority_old;
+
 const pooledTransform = new Transform();
 
 const NO_CONTEXT = {};
@@ -340,6 +348,10 @@ export function shouldSetTextContent(type, props) {
   );
 }
 
+export function getCurrentEventPriority() {
+  return DefaultLanePriority;
+}
+
 // The ART renderer is secondary to the React DOM renderer.
 export const isPrimaryRenderer = false;
 

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

@@ -47,6 +47,7 @@ import {validateDOMNesting, updatedAncestorInfo} from './validateDOMNesting';
 import {
   isEnabled as ReactBrowserEventEmitterIsEnabled,
   setEnabled as ReactBrowserEventEmitterSetEnabled,
+  getEventPriority,
 } from '../events/ReactDOMEventListener';
 import {getChildNamespace} from '../shared/DOMNamespaces';
 import {
@@ -65,10 +66,18 @@ import {
   enableSuspenseServerRenderer,
   enableCreateEventHandleAPI,
   enableScopeAPI,
+  enableNewReconciler,
 } from 'shared/ReactFeatureFlags';
 import {HostComponent, HostText} from 'react-reconciler/src/ReactWorkTags';
 import {listenToAllSupportedEvents} from '../events/DOMPluginEventSystem';
 
+import {DefaultLanePriority as DefaultLanePriority_old} from 'react-reconciler/src/ReactFiberLane.old';
+import {DefaultLanePriority as DefaultLanePriority_new} from 'react-reconciler/src/ReactFiberLane.new';
+
+const DefaultLanePriority = enableNewReconciler
+  ? DefaultLanePriority_new
+  : DefaultLanePriority_old;
+
 export type Type = string;
 export type Props = {
   autoFocus?: boolean,
@@ -372,6 +381,14 @@ export function createTextInstance(
   return textNode;
 }
 
+export function getCurrentEventPriority(): * {
+  const currentEvent = window.event;
+  if (currentEvent === undefined) {
+    return DefaultLanePriority;
+  }
+  return getEventPriority(currentEvent.type);
+}
+
 export const isPrimaryRenderer = true;
 export const warnsIfNotActing = true;
 // This initialization code may run even on server environments

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

@@ -348,7 +348,7 @@ export function attemptToDispatchEvent(
   return null;
 }
 
-function getEventPriority(domEventName: DOMEventName) {
+export function getEventPriority(domEventName: DOMEventName): * {
   switch (domEventName) {
     // Used by SimpleEventPlugin:
     case 'cancel':

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

@@ -21,10 +21,18 @@ import type {
 import {mountSafeCallback_NOT_REALLY_SAFE} from './NativeMethodsMixinUtils';
 import {create, diff} from './ReactNativeAttributePayload';
 
+import {enableNewReconciler} from 'shared/ReactFeatureFlags';
 import invariant from 'shared/invariant';
 
 import {dispatchEvent} from './ReactFabricEventEmitter';
 
+import {DefaultLanePriority as DefaultLanePriority_old} from 'react-reconciler/src/ReactFiberLane.old';
+import {DefaultLanePriority as DefaultLanePriority_new} from 'react-reconciler/src/ReactFiberLane.new';
+
+const DefaultLanePriority = enableNewReconciler
+  ? DefaultLanePriority_new
+  : DefaultLanePriority_old;
+
 // Modules provided by RN:
 import {
   ReactNativeViewConfigRegistry,
@@ -339,6 +347,10 @@ export function shouldSetTextContent(type: string, props: Props): boolean {
   return false;
 }
 
+export function getCurrentEventPriority(): * {
+  return DefaultLanePriority;
+}
+
 // The Fabric renderer is secondary to the existing React Native renderer.
 export const isPrimaryRenderer = false;
 

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

@@ -10,6 +10,7 @@
 import type {TouchedViewDataAtPoint} from './ReactNativeTypes';
 
 import invariant from 'shared/invariant';
+import {enableNewReconciler} from 'shared/ReactFeatureFlags';
 
 // Modules provided by RN:
 import {
@@ -26,6 +27,13 @@ import {
 } from './ReactNativeComponentTree';
 import ReactNativeFiberHostComponent from './ReactNativeFiberHostComponent';
 
+import {DefaultLanePriority as DefaultLanePriority_old} from 'react-reconciler/src/ReactFiberLane.old';
+import {DefaultLanePriority as DefaultLanePriority_new} from 'react-reconciler/src/ReactFiberLane.new';
+
+const DefaultLanePriority = enableNewReconciler
+  ? DefaultLanePriority_new
+  : DefaultLanePriority_old;
+
 const {get: getViewConfigForType} = ReactNativeViewConfigRegistry;
 
 export type Type = string;
@@ -261,6 +269,10 @@ export function shouldSetTextContent(type: string, props: Props): boolean {
   return false;
 }
 
+export function getCurrentEventPriority(): * {
+  return DefaultLanePriority;
+}
+
 // -------------------
 //     Mutation
 // -------------------

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

@@ -29,8 +29,16 @@ import {
 
 import ReactSharedInternals from 'shared/ReactSharedInternals';
 import enqueueTask from 'shared/enqueueTask';
+import {enableNewReconciler} from 'shared/ReactFeatureFlags';
 const {IsSomeRendererActing} = ReactSharedInternals;
 
+import {DefaultLanePriority as DefaultLanePriority_old} from 'react-reconciler/src/ReactFiberLane.old';
+import {DefaultLanePriority as DefaultLanePriority_new} from 'react-reconciler/src/ReactFiberLane.new';
+
+const DefaultLanePriority = enableNewReconciler
+  ? DefaultLanePriority_new
+  : DefaultLanePriority_old;
+
 type Container = {
   rootID: string,
   children: Array<Instance | TextInstance>,
@@ -391,6 +399,10 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {
 
     resetAfterCommit(): void {},
 
+    getCurrentEventPriority() {
+      return DefaultLanePriority;
+    },
+
     now: Scheduler.unstable_now,
 
     isPrimaryRenderer: true,

packages/react-reconciler/src/forks/ReactFiberHostConfig.custom.js

@@ -73,6 +73,7 @@ export const afterActiveInstanceBlur = $$$hostConfig.afterActiveInstanceBlur;
 export const preparePortalMount = $$$hostConfig.preparePortalMount;
 export const prepareScopeUpdate = $$$hostConfig.preparePortalMount;
 export const getInstanceFromScope = $$$hostConfig.getInstanceFromScope;
+export const getCurrentEventPriority = $$$hostConfig.getCurrentEventPriority;
 
 // -------------------
 //      Test selectors