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Revert "Offscreen: Use JS stack to track hidden/unhidden subtree stat…
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…e" (facebook#21194)

This reverts commit 1f8583d.
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@acdlite
Brian Vaughn authored and acdlite committed Apr 16, 2021
1 parent d3603f3 commit 04fe4d3
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Showing 2 changed files with 46 additions and 56 deletions.
51 changes: 23 additions & 28 deletions packages/react-reconciler/src/ReactFiberCommitWork.new.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -156,7 +156,9 @@ if (__DEV__) {
// Allows us to avoid traversing the return path to find the nearest Offscreen ancestor.
// Only used when enableSuspenseLayoutEffectSemantics is enabled.
let offscreenSubtreeIsHidden: boolean = false;
const offscreenSubtreeIsHiddenStack: Array<boolean> = [];
let offscreenSubtreeWasHidden: boolean = false;
const offscreenSubtreeWasHiddenStack: Array<boolean> = [];

const PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;

Expand Down Expand Up @@ -2303,35 +2305,11 @@ function commitLayoutEffects_begin(
const wasHidden = current !== null && current.memoizedState !== null;
const isHidden = fiber.memoizedState !== null;

const newOffscreenSubtreeIsHidden =
isHidden || offscreenSubtreeIsHidden;
const newOffscreenSubtreeWasHidden =
wasHidden || offscreenSubtreeWasHidden;
offscreenSubtreeWasHidden = wasHidden || offscreenSubtreeWasHidden;
offscreenSubtreeIsHidden = isHidden || offscreenSubtreeIsHidden;

if (
newOffscreenSubtreeIsHidden !== offscreenSubtreeIsHidden ||
newOffscreenSubtreeWasHidden !== offscreenSubtreeWasHidden
) {
const prevOffscreenSubtreeIsHidden = offscreenSubtreeIsHidden;
const prevOffscreenSubtreeWasHidden = offscreenSubtreeWasHidden;

nextEffect = fiber;
offscreenSubtreeIsHidden = newOffscreenSubtreeIsHidden;
offscreenSubtreeWasHidden = newOffscreenSubtreeWasHidden;

// Traverse the Offscreen subtree with the current Offscreen as the root.
commitLayoutEffects_begin(
fiber, // New root; bubble back up to here and stop.
root,
committedLanes,
);

nextEffect = fiber.sibling;
offscreenSubtreeIsHidden = prevOffscreenSubtreeIsHidden;
offscreenSubtreeWasHidden = prevOffscreenSubtreeWasHidden;

continue;
}
offscreenSubtreeWasHiddenStack.push(wasHidden);
offscreenSubtreeIsHiddenStack.push(isHidden);
}
}

Expand Down Expand Up @@ -2372,6 +2350,23 @@ function commitLayoutMountEffects_complete(
while (nextEffect !== null) {
const fiber = nextEffect;

if (enableSuspenseLayoutEffectSemantics && isModernRoot) {
if (fiber.tag === OffscreenComponent) {
offscreenSubtreeWasHiddenStack.pop();
offscreenSubtreeIsHiddenStack.pop();
offscreenSubtreeWasHidden =
offscreenSubtreeWasHiddenStack.length > 0 &&
offscreenSubtreeWasHiddenStack[
offscreenSubtreeWasHiddenStack.length - 1
];
offscreenSubtreeIsHidden =
offscreenSubtreeIsHiddenStack.length > 0 &&
offscreenSubtreeIsHiddenStack[
offscreenSubtreeIsHiddenStack.length - 1
];
}
}

if (
enableSuspenseLayoutEffectSemantics &&
isModernRoot &&
Expand Down
51 changes: 23 additions & 28 deletions packages/react-reconciler/src/ReactFiberCommitWork.old.js
View file
Original file line number Diff line number Diff line change
Expand Up @@ -156,7 +156,9 @@ if (__DEV__) {
// Allows us to avoid traversing the return path to find the nearest Offscreen ancestor.
// Only used when enableSuspenseLayoutEffectSemantics is enabled.
let offscreenSubtreeIsHidden: boolean = false;
const offscreenSubtreeIsHiddenStack: Array<boolean> = [];
let offscreenSubtreeWasHidden: boolean = false;
const offscreenSubtreeWasHiddenStack: Array<boolean> = [];

const PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;

Expand Down Expand Up @@ -2303,35 +2305,11 @@ function commitLayoutEffects_begin(
const wasHidden = current !== null && current.memoizedState !== null;
const isHidden = fiber.memoizedState !== null;

const newOffscreenSubtreeIsHidden =
isHidden || offscreenSubtreeIsHidden;
const newOffscreenSubtreeWasHidden =
wasHidden || offscreenSubtreeWasHidden;
offscreenSubtreeWasHidden = wasHidden || offscreenSubtreeWasHidden;
offscreenSubtreeIsHidden = isHidden || offscreenSubtreeIsHidden;

if (
newOffscreenSubtreeIsHidden !== offscreenSubtreeIsHidden ||
newOffscreenSubtreeWasHidden !== offscreenSubtreeWasHidden
) {
const prevOffscreenSubtreeIsHidden = offscreenSubtreeIsHidden;
const prevOffscreenSubtreeWasHidden = offscreenSubtreeWasHidden;

nextEffect = fiber;
offscreenSubtreeIsHidden = newOffscreenSubtreeIsHidden;
offscreenSubtreeWasHidden = newOffscreenSubtreeWasHidden;

// Traverse the Offscreen subtree with the current Offscreen as the root.
commitLayoutEffects_begin(
fiber, // New root; bubble back up to here and stop.
root,
committedLanes,
);

nextEffect = fiber.sibling;
offscreenSubtreeIsHidden = prevOffscreenSubtreeIsHidden;
offscreenSubtreeWasHidden = prevOffscreenSubtreeWasHidden;

continue;
}
offscreenSubtreeWasHiddenStack.push(wasHidden);
offscreenSubtreeIsHiddenStack.push(isHidden);
}
}

Expand Down Expand Up @@ -2372,6 +2350,23 @@ function commitLayoutMountEffects_complete(
while (nextEffect !== null) {
const fiber = nextEffect;

if (enableSuspenseLayoutEffectSemantics && isModernRoot) {
if (fiber.tag === OffscreenComponent) {
offscreenSubtreeWasHiddenStack.pop();
offscreenSubtreeIsHiddenStack.pop();
offscreenSubtreeWasHidden =
offscreenSubtreeWasHiddenStack.length > 0 &&
offscreenSubtreeWasHiddenStack[
offscreenSubtreeWasHiddenStack.length - 1
];
offscreenSubtreeIsHidden =
offscreenSubtreeIsHiddenStack.length > 0 &&
offscreenSubtreeIsHiddenStack[
offscreenSubtreeIsHiddenStack.length - 1
];
}
}

if (
enableSuspenseLayoutEffectSemantics &&
isModernRoot &&
Expand Down

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