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do not ignore events dispatched during view creation #46308

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@sammy-SC sammy-SC commented Sep 3, 2024

Summary:
changelog: [internal]

If an event happens before view has event emitter, the event is stored in a queue on ViewState. Once event emitter is assigned, the queue is drained.

However, if view dispatches event during view creation in preallocation, the event is dropped. This happens because when view is created, ViewState for the view is not created yet. The implementation of createViewUnsafe first creates a view (where view creation may trigger events) and only after it creates ViewState and stores it inside of mTagToViewState.

This diff fixes it by creating ViewState for a view before view creation.

Differential Revision: D62126909

@facebook-github-bot facebook-github-bot added CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. p: Facebook Partner: Facebook Partner labels Sep 3, 2024
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This pull request was exported from Phabricator. Differential Revision: D62126909

Summary:
Pull Request resolved: facebook#46308

changelog: [internal]

If an event happens before view has event emitter, the event is stored in a [queue](https://github.com/facebook/react-native/blob/main/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/SurfaceMountingManager.java#L1218) on [ViewState](https://github.com/facebook/react-native/blob/main/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/SurfaceMountingManager.java#L1206). Once event emitter is assigned, the queue is drained.

However, if view dispatches event during view creation in preallocation, the event is dropped. This happens because when view is created, ViewState for the view is not created yet. The implementation of [createViewUnsafe](https://github.com/facebook/react-native/blob/main/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/SurfaceMountingManager.java#L655) first creates a view (where view creation may trigger events) and only after it creates [ViewState and stores it inside of mTagToViewState](https://github.com/facebook/react-native/blob/main/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/mounting/SurfaceMountingManager.java#L675-L680).

This diff fixes it by creating ViewState for a view before view creation.

Reviewed By: javache, rubennorte

Differential Revision: D62126909
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This pull request was exported from Phabricator. Differential Revision: D62126909

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This pull request has been merged in b875b91.

@facebook-github-bot facebook-github-bot added the Merged This PR has been merged. label Sep 3, 2024
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This pull request was successfully merged by @sammy-SC in b875b91

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