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Nick Gerleman
024a8dc8ff
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/36325 A lot of the code in YogaLayoutableShadowNode expects a 1:1 mapping from ShadowNode children to Yoga Node children, which is not always the case, e.g. for `RawTextShadowNode` (if text, or a number coerced to text, is rendered outside a Text component). In S323291 we saw this cause memory corruption due to later invalid static_cast. I changed the casting mechanism to terminte instead of corrupting memory, but there is logic here that we need to make permissive (I think D29894182 (https://github.com/facebook/react-native/commit/d3e836245b5fab2e0299dd06901de74dff767b63) also tried to previously do this?). Normally Text will be rendered inside of a ParagraphShadowNode, where "Text" from React is mapped to ParagraphShadowNode (which is layoutable), "VirtualText" is mapped to TextShadowNode (which is also not layoutable), then finally the text fragment is mapped to "RawTextShadowNode". Arguably React renderer behavior should be not to send anything to native, but we can provide a generalized solution in YogaLayoutableShadowNode to handle any other cases of this issue. This solution works by filtering ShadowNode children to those which are YogaLayoutable, then only ever operating on that list of children. This means a guaranteed invariant of the nodes we operate on being layoutable (vs the adhoc error handling right now for when they are not), and means we maintain the index based mapping of ShadowNode children to Yoga Node children. Note, there is another similar API, `getLayoutableChildNodes()` which is protected and returns a filtered list of LayoutableShadowNode. This is public, to allow querying/setting layout results, whearas the similar operations in YogaLayoutableShadowNode are instead an implementation detail. Changelog: [General][Fixed] - Fix YogaLayoutableShadowNode handling of non-layoutable children Reviewed By: sammy-SC Differential Revision: D43657405 fbshipit-source-id: 8ed136b03b4da15a5e7dfbdd5539b04a2952420d