Simplify UIManagerBinding::get host-function dispatch (#57155)#57155
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sammy-SC wants to merge 6 commits into
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Simplify UIManagerBinding::get host-function dispatch (#57155)#57155sammy-SC wants to merge 6 commits into
UIManagerBinding::get host-function dispatch (#57155)#57155sammy-SC wants to merge 6 commits into
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Summary: `BaseTextProps::appendTextAttributesProps` builds a `folly::dynamic` diff of ~29 text attributes through a long flat sequence of per-attribute `if (changed) result[key] = ...` blocks, many with an embedded `has_value() ? convert(...) : nullptr` ternary. That gave the function a cyclomatic complexity (CCN) of 47, well into the "complex, hard to test" range. This is a pure, behavior-preserving refactor. The four recurring compare-and-assign shapes — plain `!=`, `floatEquality`, optional-with-converter, and color dereference — are pulled into small file-local `static` helpers, and the function body becomes a flat list of helper calls in the exact same order, with the exact same keys, conversions, and values. The serialized output (including `folly::dynamic` insertion order) is identical. Only the `.cpp` is touched; there are no public header or API changes. Changelog: [Internal] Differential Revision: D108027815
Summary: `AndroidTextInputProps::getDiffProps` computes a `folly::dynamic` prop diff through ~57 sequential per-prop `if (field != oldProps->field) result[key] = ...` blocks (plus a nested `has_value()` branch for `textAlignVertical` and an optional ternary for `acceptDragAndDropTypes`), giving the function a cyclomatic complexity (CCN) of 63 — past the landing threshold. This is a pure, behavior-preserving refactor. The recurring compare-and-assign shapes — plain `!=`, color dereference, `floatEquality`, direct `toString`/`toDynamic` conversion, and optional-with-converter — are pulled into small file-local `static` helpers, and the body becomes a flat list of helper calls in the exact same order, with the same keys, comparisons (`!=` vs `floatEquality`), conversions, and values. The serialized output (including `folly::dynamic` insertion order, so the duplicate `numberOfLines`/`includeFontPadding` keys still resolve identically) is unchanged. Only the `.cpp` is touched; there are no public header or API changes. Changelog: [Internal] Differential Revision: D108027818
Summary: `HostPlatformViewProps::getDiffProps` computes a `folly::dynamic` prop diff for Android with the highest complexity in the file: ~60 sequential per-prop `if (field != oldProps->field) result[key] = ...` guards plus inline `switch`es (`outlineStyle`, `backfaceVisibility`), a 28-call events block, a transform loop, and several accessibility object/array builders, for a cyclomatic complexity (CCN) of 87. This is a pure, behavior-preserving refactor. The recurring compare-and-assign shapes — plain `!=`, color dereference, direct `toString`/`toDynamic` conversion, and optional-with-converter — are pulled into small file-local `static` helpers, and the genuinely branching blocks (the two enum `switch`es, `overflow`/`scroll`, the events block, the transform loop, and the accessibility state/labelledBy/order/value/actions builders) are each moved verbatim into a named helper. Every prop keeps its explicit key/value/conversion on one line and in the same order, so the serialized `folly::dynamic` (keys, values, insertion order) is identical. The `// Borders` block is left inline unchanged. Only the `.cpp` is touched; there are no public header or API changes. Changelog: [Internal] Differential Revision: D108027816
Summary: `calculateShadowViewMutationsFlattener` (CCN 73) and `calculateShadowViewMutations` (CCN 45) are the core of the Fabric tree differ and were the two most complex functions in the mounting library. This is a pure, behavior-preserving refactor: cohesive blocks are extracted into file-local `static` helpers (remove/insert-on-(un)flatten, matched-grandchildren update, opposite/normal reparent handling, and the greedy diff stages), turning both functions into flat sequences of helper calls. Traversal order and the exact sequence of emitted mutations are preserved. Only the `.cpp` is touched; no header or public API change. Changelog: [Internal] Differential Revision: D108027813
Summary: `FabricMountingManager::executeMount` (CCN 59) dispatched a large per-mutation-type `switch` with repeated buffer-append boilerplate. This is a pure, behavior-preserving refactor: the five mutation-type case bodies are extracted into file-local `static` helpers backed by a small `MountItemBuffers` struct (holding `maintainMutationOrder` plus references to the output vectors, with an `orderedOr()` helper reproducing the exact `maintainMutationOrder ? common : bucket` selection), and the seven repeated empty-guard + per-item loops collapse into one templated batch writer. Ordering and side effects are preserved exactly (including the Update-case event-emitter quirk and Delete-batch-last ordering). Anonymous-namespace helpers only; no header or public API change. Changelog: [Internal] Differential Revision: D108027810
Summary: `UIManagerBinding::get` (CCN 71) builds the UIManager JSI host object via one long chain of `if (methodName == "...") return Function::createFromHostFunction(...)`. This is a pure, behavior-preserving refactor: contiguous groups of methods are extracted into file-local `static` helpers that each return `std::optional<jsi::Value>` (node management, child set, layout/command, measurement, DOM-compat, view-transition, etc.); `get` consults them in order and falls through identically. Method names, arities, and host-function bodies are unchanged. Only the `.cpp` is touched; no header or public API change. Changelog: [Internal] Differential Revision: D108027814
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UIManagerBinding::get host-function dispatchUIManagerBinding::get host-function dispatch (#57155)
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Summary:
UIManagerBinding::get(CCN 71) builds the UIManager JSI host object via one long chain ofif (methodName == "...") return Function::createFromHostFunction(...). This is a pure, behavior-preserving refactor: contiguous groups of methods are extracted into file-localstatichelpers that each returnstd::optional<jsi::Value>(node management, child set, layout/command, measurement, DOM-compat, view-transition, etc.);getconsults them in order and falls through identically. Method names, arities, and host-function bodies are unchanged. Only the.cppis touched; no header or public API change.Changelog: [Internal]
Differential Revision: D108027814