[ddx533534]

Summary:

On Android, BorderRadiusStyle.resolve maps borderBottomStartRadius to the bottom-left corner and borderBottomEndRadius to the bottom-right corner when the layout direction is RTL and I18nManager.swapLeftAndRightInRTL(false) is set. In RTL, these logical properties should resolve to the bottom-right and bottom-left corners respectively, regardless of whether physical left/right styles are swapped.

For example, a 100 x 100 view with borderBottomStartRadius: 10 and borderBottomEndRadius: 20 currently resolves to bottom-left = 10 and bottom-right = 20 in that configuration. This change resolves them to bottom-left = 20 and bottom-right = 10.

Fix the two logical fallbacks in the RTL no-swap branch. Correct the corresponding expectations in testCorrectPriorityRTLNoSwap, which currently encode the same incorrect mapping, and add a regression test using distinct bottom-start and bottom-end radii with physical swapping both enabled and disabled. The existing priority tests also cover physical fallbacks, fully logical overrides, and zero-valued overrides.

Changelog:

[ANDROID] [FIXED] - Fix bottom-start and bottom-end border radii resolving to the wrong corners in RTL when left/right style swapping is disabled.

Test Plan:

• git diff --check: passed before committing.

• Kotlin formatting check using the repository-pinned ktfmt 0.59.0: passed for both changed files. Exact PowerShell command:

  & 'C:/Program Files/JetBrains/RustRover 2026.2.2/jbr/bin/java.exe' -jar E:/react-native/.tools/format/node_modules/ktfmt/lib/ktfmt.jar --do-not-remove-unused-imports --dry-run --set-exit-if-changed packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/style/BorderRadiusStyle.kt packages/react-native/ReactAndroid/src/test/java/com/facebook/react/uimanager/BorderRadiusStyleTest.kt

• Attempted the targeted Android unit tests:

  ./gradlew.bat :packages:react-native:ReactAndroid:testDebugUnitTest --tests com.facebook.react.uimanager.BorderRadiusStyleTest --no-daemon

  The tests did not execute: the wrapper could not download Gradle 9.4.1 in the restricted environment (Permission denied: getsockopt). A retry outside the sandbox made no download progress and was stopped. The Android SDK/NDK is not configured on this machine. The unit tests still need to run in CI or an Android development environment.

• RNTester/device validation and screenshots were not available in this environment. To validate visually, enable RTL, disable physical left/right swapping, restart the app, and render the 100 x 100 view described above. Expect the bottom-right radius to be 10 and the bottom-left radius to be 20; enabling swapping should preserve these logical corner assignments.

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[ddx533534]

Hi @cortinico , could you take a look at this Android RTL border-radius fix? I noticed you reviewed the related bottom-end RTL fix in #51229. This PR addresses the bottom logical corner mapping when physical left/right swapping is disabled and adds a regression test for both swap settings. The Test All workflow is still awaiting maintainer approval.

[meta-codesync]

@cortinico has imported this pull request. If you are a Meta employee, you can view this in D126298086.

[react-native-bot]

This pull request was successfully merged by @ddx533534 in 202d939

^{When will my fix make it into a release? | How to file a pick request?}

[meta-codesync]

@cortinico merged this pull request in 202d939.