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@coado has exported this pull request. If you are a Meta employee, you can view the originating Diff in D128598698. |
Summary: Props diffing (`enablePropsUpdateReconciliationAndroid`) applies to every component whose props implement `getDiffProps`, which includes all codegen components. On view creation, props equal to their C++ default are not sent, so a native component whose default differs from the C++ default ends up with the wrong value. Third-party components have not been checked for this, which makes the existing flag unsafe to try in OSS. This adds `enableCoreComponentsPropsUpdateReconciliationAndroid`, released in the experimental stage, which enables props diffing only for the core components with hand-written props (View, Paragraph, Text, RawText, TextEffect, Image, ScrollView). All other components keep receiving raw props. TextInput is intentionally not included: on Android its component name is `AndroidTextInput` while its props report `TextInput` as the diffing target, so props diffing has never applied to it under either flag. Fixing that is left for a separate change. The decision now lives in a single non-virtual function, `isPropsDiffingEnabled`, used by both `FabricMountingManager::getProps` and `ConcreteComponentDescriptor::cloneProps`, so the two decisions cannot diverge. Behavior with the new flag off is unchanged. The Android ScrollViews (vertical, nested and horizontal) switch their native default `overflow` from `scroll` to `visible` under props diffing, because the C++ default `visible` is never sent. This switch only checked `enablePropsUpdateReconciliationAndroid`, so with only the new flag enabled ScrollViews clipped their content. The default is now resolved in one place, `ReactScrollViewHelper.getDefaultOverflow()`, which checks both flags. Changelog: [Android][Added] - Add experimental feature flag `enableCoreComponentsPropsUpdateReconciliationAndroid` to send prop updates based on props diffing for core components only Differential Revision: D127587361
Summary: This diff enables props diffing for the TextInput component on Android. Changelog: [Android][Fixed] - Fix props diffing never being applied to `TextInput` when props update reconciliation is enabled Differential Revision: D128563541
Summary: Pull Request resolved: react#59679 For some props, their C++ defaults did not equal platform defaults. With props diffing enabled, default value is not sent, so the platform one is assumed. Some defaults did not match: - `showSoftInputOnFocus` and `allowFontScaling` defaulted to `false` in C++ but are `true` natively, so setting them to `false` from JS had no effect. - `autoCorrect` was a plain `bool` defaulting to `false`, while the native setter has three states (on, off, unset). `autoCorrect={false}` was never sent and removing the prop could not restore the platform default. It is now `std::optional<bool>` and is sent as `null` when unset. - `numberOfLines`, `textBreakStrategy` and `includeFontPadding` were each emitted twice, once from the paragraph attributes and once from a duplicate flat field, with the later one overwriting the earlier. The flat `includeFontPadding` defaulted to `false` while the native default is `true`, so removing `includeFontPadding={true}` sent `false`. These keys are now only emitted from the paragraph attributes. Changelog: [Android][Fixed] - Fix `TextInput` props `showSoftInputOnFocus`, `allowFontScaling`, `autoCorrect` and `includeFontPadding` being ignored or reset incorrectly when props diffing is enabled Differential Revision: D128594780
Summary: Pull Request resolved: react#59680 `HostPlatformViewProps::getDiffProps` sends a `scroll` key with the same value as `overflow` whenever clipping changes. No Android view manager has a `scroll` prop and nothing reads that key directly; every component reads `overflow`. `ViewProps.SCROLL` is the overflow value `"scroll"`, not a prop name. The key only adds a JNI string and a failed setter lookup per update, so remove it. Changelog: [Internal] Differential Revision: D128598698
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Summary:
HostPlatformViewProps::getDiffPropssends ascrollkey with the same value asoverflowwhenever clipping changes. No Android view manager has ascrollprop and nothing reads that key directly; every component readsoverflow.ViewProps.SCROLLis the overflow value"scroll", not a prop name. The key only adds a JNI string and a failed setter lookup per update, so remove it.Changelog:
[Internal]
Differential Revision: D128598698