Vincent Riemer
7cd69962d0
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/38674 Changelog: [Internal] - Refactor conditional pointer event emitting to the C++ layer Some background: early on in the implementation of Pointer Events a concern was brought up that events related to hovering pointers could saturate the JS thread if they were fired all the time unconditionally, so as a mitigation we would check in native to see if listeners in the tree were listening for those events and only fire them if there were listeners. Now since we're going to be moving some of the event derivation logic to the C++ layer we need to receive all the events — but recreate the conditional firing in the C++ layer so we can still avoid saturating the JS thread. That's what this diff does. The only change I see being potentially contraversial is the fact that I needed a way to turn an `EventTarget` (the only information I receive regarding which node the event is firing on) to its cooresponding `ShadowNode` which I did in the method `GetShadowNodeFromEventTarget`. It essentially does the exact same thing the `getNodeFromInternalInstanceHandle` method in `ReactNativePublicCompat.js`, but in C++ against the JSI API. I don't know if there's a better way to do this but this was the best one I came up with that actually works. Reviewed By: NickGerleman Differential Revision: D47852371 fbshipit-source-id: 6c00c2fcfdfd49314c96d044d36272e028e074ff
React Native
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React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.
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Contents
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- How to Contribute
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🎉 Building your first React Native app
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📖 Documentation
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