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Fix context propagation for offscreen/fallback trees #23095

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merged 7 commits into from Jan 19, 2022
Merged

Fix context propagation for offscreen/fallback trees #23095

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d6dc202
Failing test for Context.Consumer in suspended Suspense
overlookmotel Aug 26, 2020
0ce097b
Fix context propagation for offscreen trees
gaearon Jan 11, 2022
92c5c04
Address nits
gaearon Jan 18, 2022
7d93066
Specify propagation root for Suspense too
gaearon Jan 18, 2022
09a1975
Pass correct propagation root
gaearon Jan 19, 2022
1fed15d
Harden test coverage
gaearon Jan 19, 2022
d465a97
Remove superfluous warning
gaearon Jan 19, 2022
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12 changes: 7 additions & 5 deletions packages/react-reconciler/src/ReactFiberBeginWork.new.js
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Expand Up @@ -173,7 +173,7 @@ import {
checkIfContextChanged,
readContext,
prepareToReadContext,
scheduleWorkOnParentPath,
scheduleContextWorkOnParentPath,
} from './ReactFiberNewContext.new';
import {
renderWithHooks,
Expand Down Expand Up @@ -2754,13 +2754,15 @@ function updateDehydratedSuspenseComponent(
}
}

function scheduleWorkOnFiber(fiber: Fiber, renderLanes: Lanes) {
function scheduleSuspenseWorkOnFiber(fiber: Fiber, renderLanes: Lanes) {
fiber.lanes = mergeLanes(fiber.lanes, renderLanes);
const alternate = fiber.alternate;
if (alternate !== null) {
alternate.lanes = mergeLanes(alternate.lanes, renderLanes);
}
scheduleWorkOnParentPath(fiber.return, renderLanes);
// Guaranteed to be non-empty since the fiber is not a root.
const parentFiber: Fiber = (fiber.return: any);
scheduleContextWorkOnParentPath(parentFiber, renderLanes, parentFiber);
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}

function propagateSuspenseContextChange(
Expand All @@ -2776,15 +2778,15 @@ function propagateSuspenseContextChange(
if (node.tag === SuspenseComponent) {
const state: SuspenseState | null = node.memoizedState;
if (state !== null) {
scheduleWorkOnFiber(node, renderLanes);
scheduleSuspenseWorkOnFiber(node, renderLanes);
}
} else if (node.tag === SuspenseListComponent) {
// If the tail is hidden there might not be an Suspense boundaries
// to schedule work on. In this case we have to schedule it on the
// list itself.
// We don't have to traverse to the children of the list since
// the list will propagate the change when it rerenders.
scheduleWorkOnFiber(node, renderLanes);
scheduleSuspenseWorkOnFiber(node, renderLanes);
} else if (node.child !== null) {
node.child.return = node;
node = node.child;
Expand Down
12 changes: 7 additions & 5 deletions packages/react-reconciler/src/ReactFiberBeginWork.old.js
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Expand Up @@ -173,7 +173,7 @@ import {
checkIfContextChanged,
readContext,
prepareToReadContext,
scheduleWorkOnParentPath,
scheduleContextWorkOnParentPath,
} from './ReactFiberNewContext.old';
import {
renderWithHooks,
Expand Down Expand Up @@ -2754,13 +2754,15 @@ function updateDehydratedSuspenseComponent(
}
}

function scheduleWorkOnFiber(fiber: Fiber, renderLanes: Lanes) {
function scheduleSuspenseWorkOnFiber(fiber: Fiber, renderLanes: Lanes) {
fiber.lanes = mergeLanes(fiber.lanes, renderLanes);
const alternate = fiber.alternate;
if (alternate !== null) {
alternate.lanes = mergeLanes(alternate.lanes, renderLanes);
}
scheduleWorkOnParentPath(fiber.return, renderLanes);
// Guaranteed to be non-empty since the fiber is not a root.
const parentFiber: Fiber = (fiber.return: any);
scheduleContextWorkOnParentPath(parentFiber, renderLanes, parentFiber);
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}

function propagateSuspenseContextChange(
Expand All @@ -2776,15 +2778,15 @@ function propagateSuspenseContextChange(
if (node.tag === SuspenseComponent) {
const state: SuspenseState | null = node.memoizedState;
if (state !== null) {
scheduleWorkOnFiber(node, renderLanes);
scheduleSuspenseWorkOnFiber(node, renderLanes);
}
} else if (node.tag === SuspenseListComponent) {
// If the tail is hidden there might not be an Suspense boundaries
// to schedule work on. In this case we have to schedule it on the
// list itself.
// We don't have to traverse to the children of the list since
// the list will propagate the change when it rerenders.
scheduleWorkOnFiber(node, renderLanes);
scheduleSuspenseWorkOnFiber(node, renderLanes);
} else if (node.child !== null) {
node.child.return = node;
node = node.child;
Expand Down
43 changes: 37 additions & 6 deletions packages/react-reconciler/src/ReactFiberNewContext.new.js
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Expand Up @@ -138,9 +138,10 @@ export function popProvider(
}
}

export function scheduleWorkOnParentPath(
export function scheduleContextWorkOnParentPath(
parent: Fiber | null,
renderLanes: Lanes,
propagationRoot: Fiber,
) {
// Update the child lanes of all the ancestors, including the alternates.
let node = parent;
Expand All @@ -157,10 +158,24 @@ export function scheduleWorkOnParentPath(
) {
alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);
} else {
// Neither alternate was updated, which means the rest of the
// Neither alternate was updated.
// Normally, this would mean that the rest of the
// ancestor path already has sufficient priority.
// However, this is not necessarily true inside offscreen
// or fallback trees because childLanes may be inconsistent
// with the surroundings. This is why we continue the loop.
}
if (node === propagationRoot) {
break;
}
if (__DEV__) {
if (node === propagationRoot.alternate) {
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console.error(
'Did not expect to encounter a propagation root alternate when scheduling context work. ' +
'This error is likely caused by a bug in React. Please file an issue.',
);
}
}
node = node.return;
}
}
Expand Down Expand Up @@ -246,7 +261,11 @@ function propagateContextChange_eager<T>(
if (alternate !== null) {
alternate.lanes = mergeLanes(alternate.lanes, renderLanes);
}
scheduleWorkOnParentPath(fiber.return, renderLanes);
scheduleContextWorkOnParentPath(
fiber.return,
renderLanes,
workInProgress,
);

// Mark the updated lanes on the list, too.
list.lanes = mergeLanes(list.lanes, renderLanes);
Expand Down Expand Up @@ -284,7 +303,11 @@ function propagateContextChange_eager<T>(
// because we want to schedule this fiber as having work
// on its children. We'll use the childLanes on
// this fiber to indicate that a context has changed.
scheduleWorkOnParentPath(parentSuspense, renderLanes);
scheduleContextWorkOnParentPath(
parentSuspense,
renderLanes,
workInProgress,
);
nextFiber = fiber.sibling;
} else {
// Traverse down.
Expand Down Expand Up @@ -365,7 +388,11 @@ function propagateContextChanges<T>(
if (alternate !== null) {
alternate.lanes = mergeLanes(alternate.lanes, renderLanes);
}
scheduleWorkOnParentPath(consumer.return, renderLanes);
scheduleContextWorkOnParentPath(
consumer.return,
renderLanes,
workInProgress,
);

if (!forcePropagateEntireTree) {
// During lazy propagation, when we find a match, we can defer
Expand Down Expand Up @@ -406,7 +433,11 @@ function propagateContextChanges<T>(
// because we want to schedule this fiber as having work
// on its children. We'll use the childLanes on
// this fiber to indicate that a context has changed.
scheduleWorkOnParentPath(parentSuspense, renderLanes);
scheduleContextWorkOnParentPath(
parentSuspense,
renderLanes,
workInProgress,
);
nextFiber = null;
} else {
// Traverse down.
Expand Down
43 changes: 37 additions & 6 deletions packages/react-reconciler/src/ReactFiberNewContext.old.js
View file
Open in desktop
Expand Up @@ -138,9 +138,10 @@ export function popProvider(
}
}

export function scheduleWorkOnParentPath(
export function scheduleContextWorkOnParentPath(
parent: Fiber | null,
renderLanes: Lanes,
propagationRoot: Fiber,
) {
// Update the child lanes of all the ancestors, including the alternates.
let node = parent;
Expand All @@ -157,10 +158,24 @@ export function scheduleWorkOnParentPath(
) {
alternate.childLanes = mergeLanes(alternate.childLanes, renderLanes);
} else {
// Neither alternate was updated, which means the rest of the
// Neither alternate was updated.
// Normally, this would mean that the rest of the
// ancestor path already has sufficient priority.
// However, this is not necessarily true inside offscreen
// or fallback trees because childLanes may be inconsistent
// with the surroundings. This is why we continue the loop.
}
if (node === propagationRoot) {
break;
}
if (__DEV__) {
if (node === propagationRoot.alternate) {
console.error(
'Did not expect to encounter a propagation root alternate when scheduling context work. ' +
'This error is likely caused by a bug in React. Please file an issue.',
);
}
}
node = node.return;
}
}
Expand Down Expand Up @@ -246,7 +261,11 @@ function propagateContextChange_eager<T>(
if (alternate !== null) {
alternate.lanes = mergeLanes(alternate.lanes, renderLanes);
}
scheduleWorkOnParentPath(fiber.return, renderLanes);
scheduleContextWorkOnParentPath(
fiber.return,
renderLanes,
workInProgress,
);

// Mark the updated lanes on the list, too.
list.lanes = mergeLanes(list.lanes, renderLanes);
Expand Down Expand Up @@ -284,7 +303,11 @@ function propagateContextChange_eager<T>(
// because we want to schedule this fiber as having work
// on its children. We'll use the childLanes on
// this fiber to indicate that a context has changed.
scheduleWorkOnParentPath(parentSuspense, renderLanes);
scheduleContextWorkOnParentPath(
parentSuspense,
renderLanes,
workInProgress,
);
nextFiber = fiber.sibling;
} else {
// Traverse down.
Expand Down Expand Up @@ -365,7 +388,11 @@ function propagateContextChanges<T>(
if (alternate !== null) {
alternate.lanes = mergeLanes(alternate.lanes, renderLanes);
}
scheduleWorkOnParentPath(consumer.return, renderLanes);
scheduleContextWorkOnParentPath(
consumer.return,
renderLanes,
workInProgress,
);

if (!forcePropagateEntireTree) {
// During lazy propagation, when we find a match, we can defer
Expand Down Expand Up @@ -406,7 +433,11 @@ function propagateContextChanges<T>(
// because we want to schedule this fiber as having work
// on its children. We'll use the childLanes on
// this fiber to indicate that a context has changed.
scheduleWorkOnParentPath(parentSuspense, renderLanes);
scheduleContextWorkOnParentPath(
parentSuspense,
renderLanes,
workInProgress,
);
nextFiber = null;
} else {
// Traverse down.
Expand Down
63 changes: 63 additions & 0 deletions packages/react-reconciler/src/__tests__/ReactSuspense-test.internal.js
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Expand Up @@ -1532,5 +1532,68 @@ describe('ReactSuspense', () => {
expect(Scheduler).toFlushUntilNextPaint(['new value']);
expect(root).toMatchRenderedOutput('new value');
});

it('updates context consumer within child of suspended suspense component when context updates', () => {
const {createContext, useState} = React;

const ValueContext = createContext(null);

const promiseThatNeverResolves = new Promise(() => {});
function Child() {
return (
<ValueContext.Consumer>
{value => {
Scheduler.unstable_yieldValue(
`Received context value [${value}]`,
);
if (value === 'default') return <Text text="default" />;
throw promiseThatNeverResolves;
}}
</ValueContext.Consumer>
);
}

let setValue;
function Wrapper({children}) {
const [value, _setValue] = useState('default');
setValue = _setValue;
return (
<ValueContext.Provider value={value}>
{children}
</ValueContext.Provider>
);
}

function App() {
return (
<Wrapper>
<Suspense fallback={<Text text="Loading..." />}>
<Child />
</Suspense>
</Wrapper>
);
}

const root = ReactTestRenderer.create(<App />);
expect(Scheduler).toHaveYielded([
'Received context value [default]',
'default',
]);
expect(root).toMatchRenderedOutput('default');

act(() => setValue('new value'));
expect(Scheduler).toHaveYielded([
'Received context value [new value]',
'Loading...',
]);
expect(root).toMatchRenderedOutput('Loading...');

act(() => setValue('default'));
expect(Scheduler).toHaveYielded([
'Received context value [default]',
'default',
]);
expect(root).toMatchRenderedOutput('default');
});
});
});