foo

Author: lunaruan

packages/react-art/src/ReactARTHostConfig.js

@@ -451,3 +451,7 @@ export function preparePortalMount(portalInstance: any): void {
 export function detachDeletedInstance(node: Instance): void {
   // noop
 }
+
+export function requestPostPaintCallback(callback: (time: number) => void) {
+  // noop
+}

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

@@ -377,7 +377,10 @@ export const cancelTimeout: any =
   typeof clearTimeout === 'function' ? clearTimeout : (undefined: any);
 export const noTimeout = -1;
 const localPromise = typeof Promise === 'function' ? Promise : undefined;
-
+const localRequestAnimationFrame =
+  typeof requestAnimationFrame === 'function'
+    ? requestAnimationFrame
+    : scheduleTimeout;
 // -------------------
 //     Microtasks
 // -------------------
@@ -1379,3 +1382,9 @@ export function setupIntersectionObserver(
     },
   };
 }
+
+export function requestPostPaintCallback(callback: (time: number) => void) {
+  localRequestAnimationFrame(() => {
+    localRequestAnimationFrame(time => callback(time));
+  });
+}

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

@@ -609,3 +609,7 @@ export function preparePortalMount(portalInstance: Instance): void {
 export function detachDeletedInstance(node: Instance): void {
   // noop
 }
+
+export function requestPostPaintCallback(callback: (time: number) => void) {
+  // noop
+}

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

@@ -510,3 +510,7 @@ export function preparePortalMount(portalInstance: Instance): void {
 export function detachDeletedInstance(node: Instance): void {
   // noop
 }
+
+export function requestPostPaintCallback(callback: (time: number) => void) {
+  // noop
+}

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

@@ -473,6 +473,11 @@ function createReactNoop(reconciler: Function, useMutation: boolean) {
     logRecoverableError() {
       // no-op
     },
+
+    requestPostPaintCallback(callback) {
+      const endTime = Scheduler.unstable_now();
+      callback(endTime);
+    },
   };
 
   const hostConfig = useMutation

packages/react-reconciler/src/ReactFiberHostConfigWithNoMutation.js

@@ -35,3 +35,4 @@ export const hideTextInstance = shim;
 export const unhideInstance = shim;
 export const unhideTextInstance = shim;
 export const clearContainer = shim;
+export const requestPostPaintCallback = shim;

packages/react-reconciler/src/__tests__/ReactFiberHostContext-test.internal.js

@@ -67,6 +67,7 @@ describe('ReactFiberHostContext', () => {
         return DefaultEventPriority;
       },
       supportsMutation: true,
+      requestPostPaintCallback: function() {},
     });
 
     const container = Renderer.createContainer(
@@ -129,6 +130,7 @@ describe('ReactFiberHostContext', () => {
       getCurrentEventPriority: function() {
         return DefaultEventPriority;
       },
+      requestPostPaintCallback: function() {},
       supportsMutation: true,
     });
 

packages/react-reconciler/src/__tests__/ReactTransitionTracing-test.js

@@ -2273,4 +2273,66 @@ describe('ReactInteractionTracing', () => {
     });
     expect(Scheduler).toHaveYielded(['Hidden Text']);
   });
+
+  // @gate enableTransitionTracing
+  it('discrete events', async () => {
+    const transitionCallbacks = {
+      onTransitionStart: (name, startTime) => {
+        Scheduler.unstable_yieldValue(
+          `onTransitionStart(${name}, ${startTime})`,
+        );
+      },
+      onTransitionProgress: (name, startTime, endTime, pending) => {
+        const suspenseNames = pending.map(p => p.name || '<null>').join(', ');
+        Scheduler.unstable_yieldValue(
+          `onTransitionProgress(${name}, ${startTime}, ${endTime}, [${suspenseNames}])`,
+        );
+      },
+      onTransitionComplete: (name, startTime, endTime) => {
+        Scheduler.unstable_yieldValue(
+          `onTransitionComplete(${name}, ${startTime}, ${endTime})`,
+        );
+      },
+    };
+
+    function App() {
+      return (
+        <Suspense
+          fallback={<Text text="Loading..." />}
+          unstable_name="suspense page">
+          <AsyncText text="Page Two" />
+        </Suspense>
+      );
+    }
+
+    const root = ReactNoop.createRoot({
+      unstable_transitionCallbacks: transitionCallbacks,
+    });
+
+    await act(async () => {
+      ReactNoop.discreteUpdates(() =>
+        startTransition(() => root.render(<App />), {name: 'page transition'}),
+      );
+      ReactNoop.expire(1000);
+      await advanceTimers(1000);
+    });
+
+    expect(Scheduler).toHaveYielded([
+      'Suspend [Page Two]',
+      'Loading...',
+      'onTransitionStart(page transition, 0)',
+      'onTransitionProgress(page transition, 0, 1000, [suspense page])',
+    ]);
+    await act(async () => {
+      ReactNoop.discreteUpdates(() => resolveText('Page Two'));
+      ReactNoop.expire(1000);
+      await advanceTimers(1000);
+    });
+
+    expect(Scheduler).toHaveYielded([
+      'Page Two',
+      'onTransitionProgress(page transition, 0, 2000, [])',
+      'onTransitionComplete(page transition, 0, 2000)',
+    ]);
+  });
 });

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

@@ -67,6 +67,7 @@ export const prepareScopeUpdate = $$$hostConfig.prepareScopeUpdate;
 export const getInstanceFromScope = $$$hostConfig.getInstanceFromScope;
 export const getCurrentEventPriority = $$$hostConfig.getCurrentEventPriority;
 export const detachDeletedInstance = $$$hostConfig.detachDeletedInstance;
+export const requestPostPaintCallback = $$$hostConfig.requestPostPaintCallback;
 
 // -------------------
 //      Microtasks

packages/react-test-renderer/src/ReactTestHostConfig.js

@@ -317,3 +317,7 @@ export function detachDeletedInstance(node: Instance): void {
 export function logRecoverableError(error: mixed): void {
   // noop
 }
+
+export function requestPostPaintCallback(callback: (time: number) => void) {
+  // noop
+}