fix: skip invalid regions and overlays instead of crashing the map - #158
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An invalid `region` reached `MKCoordinateRegion` and `LatLngBounds` verbatim: MapKit raises an Objective-C NSException that Swift cannot catch, and Google Maps throws inside a Nitro view prop setter, which aborts the whole Fabric mount transaction and takes every other overlay with it. - JS: an unusable `region` is held at the last one the view accepted, with a `__DEV__` warning. It cannot become `undefined`, because React rewrites a removed prop to `null`, the optional JSI converter only short-circuits on `undefined`, and the generated struct converter then calls `asObject` on it - the same mechanism as #119. - Kotlin: `Coordinate`, `Region` and overlay descriptor validity extensions; `applyRegion` and `fitToCoordinates` check before building bounds, and `MapOverlayController` both pre-filters descriptors and treats an `IllegalArgumentException` from `GoogleMap.add*` as a skipped overlay rather than letting it unwind `reconcile`. - Swift: both provider adapters guard `applyRegion` with `CLLocationCoordinate2DIsValid` and filter `fitToCoordinates`. A span whose edges run past a pole is pulled back with `regionThatFits` - as `animateToClusterRegion` already did - instead of being rejected, and the Google bounds conversion clamps latitude for the same reason. `fitToCoordinates` filters on the calling thread, so a bad coordinate no longer reaches `LatLngBounds` on the main looper, where the throw surfaces as an uncaught exception the JS caller cannot handle. The imperative method validates in JS too, so both platforms report the skip the same way. The shared bounds rule lives in the `ios/Geometry` SPM target because that is the only iOS test target CI runs - autolinking declares the pod without `:testspecs`, so `iosTests/` is never built. Drive-by, all flagged by review: the coordinate predicates move out of `overlays/` into `utils/validateGeometry.ts` so `region/` no longer depends on them through another feature; the three identical `warn*` helpers collapse onto one `createWarn`; the logcat tag has one definition again; and the shared `console.warn` spy is cleared before each test, not only after - it leaks across files and already failed `warnOverlay` in a full-suite run. Refs #125
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WalkthroughThe change adds invalid-input validation across JavaScript, Android, and iOS. Invalid coordinates, regions, radii, and overlays are filtered or skipped. Development warnings and native logs report rejected inputs. Tests and README documentation describe the rules. ChangesInvalid input handling
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~45 minutes Change: Bug fix · Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant MapView
participant NativeAdapter
participant MapSDK
MapView->>MapView: filter invalid region or coordinates
MapView->>NativeAdapter: pass accepted input
NativeAdapter->>NativeAdapter: validate at native boundary
NativeAdapter->>MapSDK: apply valid camera or overlay input
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Inline comments:
In `@package/src/region/resolveRegionProp.ts`:
- Around line 15-16: Update the region resolution logic around isValidRegion so
region == null returns lastAccepted, while valid non-null regions continue
returning region. Preserve undefined on the initial render when no region has
been accepted, and add a regression test covering a validRegion followed by
undefined.
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README.mdpackage/android/src/main/java/com/margelo/nitro/nitromaps/Coordinate+Validity.ktpackage/android/src/main/java/com/margelo/nitro/nitromaps/GoogleMapProviderAdapter.ktpackage/android/src/main/java/com/margelo/nitro/nitromaps/MapOverlayController.ktpackage/android/src/main/java/com/margelo/nitro/nitromaps/MarkerIconFactory.ktpackage/android/src/main/java/com/margelo/nitro/nitromaps/NitroMapsLogTag.ktpackage/android/src/main/java/com/margelo/nitro/nitromaps/OverlayDescriptor+Validity.ktpackage/android/src/main/java/com/margelo/nitro/nitromaps/Region+Validity.ktpackage/android/src/test/java/com/margelo/nitro/nitromaps/CoordinateValidityTest.ktpackage/android/src/test/java/com/margelo/nitro/nitromaps/OverlayDescriptorValidityTest.ktpackage/android/src/test/java/com/margelo/nitro/nitromaps/RegionValidityTest.ktpackage/ios/AppleMapProviderAdapter.swiftpackage/ios/Coordinate+Validity.swiftpackage/ios/Geometry/RegionSpan.swiftpackage/ios/GoogleMapProviderAdapter.swiftpackage/ios/Package.swiftpackage/ios/Region+GMSCoordinateBounds.swiftpackage/ios/Region+Validity.swiftpackage/ios/Tests/ColorParser/HexColorComponentsTests.swiftpackage/ios/Tests/Geometry/RegionSpanTests.swiftpackage/src/components/MapView.tsxpackage/src/geojson/__tests__/warnGeojson.test.tspackage/src/geojson/warnGeojson.tspackage/src/overlays/__tests__/warnOverlay.test.tspackage/src/overlays/collectOverlayChild.tspackage/src/overlays/warnOverlay.tspackage/src/region/__tests__/isValidRegion.test.tspackage/src/region/__tests__/resolveFitCoordinates.test.tspackage/src/region/__tests__/resolveRegionProp.test.tspackage/src/region/isValidRegion.tspackage/src/region/resolveFitCoordinates.tspackage/src/region/resolveRegionProp.tspackage/src/region/useValidRegion.tspackage/src/region/warnRegion.tspackage/src/utils/__tests__/validateGeometry.test.tspackage/src/utils/validateGeometry.tspackage/src/utils/warn.ts
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Unsetting `region` on a mounted view reached the native prop as `null` - React rewrites a removed prop that way - and the generated struct converter throws on it, the same crash an invalid region used to cause. The invariant the file already documented now covers both transitions.
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…nd-cluster-fixes Conflicts with the fixes that landed on main since 1.2.1, resolved as follows: - Android region fits keep main's validity check and zero fit padding (#163) under the skip-cache, and run through the shared runOnMain helper (#161). - Android shapes keep main's validation and SDK-rejection guard (#158). An in-place update the SDK rejects removes the overlay, as a rejected re-add did. - Android marker refreshes use main's MarkerRenderState (#155) and executeCompute (#180). The refresh inbox frees its slot when clear() drops the queued task with shutdownNow(). - iOS Google checks that the region is valid before the skip-cache. - MapView compares region and camera after validation (#160), because an invalid camera may have no center to compare.
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Closes #125.
A coordinate, region or radius that is
NaNor out of range used to be forwarded verbatim to MapKit and the Google Maps SDK. MapKit raises an Objective-CNSExceptionthat Swift cannot catch; Google Maps throws inside a Nitro view prop setter, which aborts the whole Fabric mount transaction and takes every other overlay on the screen down with it. The JS half for overlay children landed earlier in #143 (issue #128); this is the rest — the native guards on both platforms andregion.What changed
JS. An unusable
regionis held at the last one the view accepted, with a__DEV__warning. The imperativefitToCoordinatesdrops unplaceable coordinates and warns the same way, so both platforms report it identically. Coordinate predicates moved fromoverlays/toutils/validateGeometry.ts, soregion/no longer reaches through another feature to use them.Kotlin.
Coordinate,Regionand overlay-descriptor validity extensions.applyRegionandfitToCoordinatescheck before building bounds —fitToCoordinatesfilters on the calling thread, so a bad value no longer reachesLatLngBoundson the main looper, where the throw surfaces as an uncaught exception the JS caller cannot eventry/catch.MapOverlayControllerboth pre-filters descriptors and treats anIllegalArgumentExceptionout ofGoogleMap.add*as a skipped overlay rather than letting it unwindreconcile.Swift. Both provider adapters guard
applyRegionwithCLLocationCoordinate2DIsValidand filterfitToCoordinates.Two things the review changed, worth a reviewer's attention
Dropping the prop to
undefinedwas itself a crash. The first cut passedundefinedto the nativeregionprop. React rewrites a removed prop tonull(ReactNativeAttributePayload.js:271), the optional JSI converter short-circuits only onundefined(JSIConverter+Optional.hpp:26), and the generated struct converter then callsasObjecton it — the same mechanism as #119. So a mounted view going valid → invalid threwMapView.region: Value is null, expected an Object. Holding the last accepted region avoids the transition entirely, and is also what the map should show.Centre and span were checked independently.
{ latitude: 85, latitudeDelta: 20 }puts an edge at 95° and passed every guard.applyRegionnow routes throughview.regionThatFits(_:)— asanimateToClusterRegionalready did — and theGMSCoordinateBoundsconversion clamps latitude, so such a span is pulled back to what the map can show instead of being rejected.Tests
Bun tests for the JS validators and the region/fit resolution, JUnit for the Kotlin predicates, and swift-testing for the span rule. The iOS tests live in the
ios/GeometrySPM target rather thanpackage/iosTests/, because autolinking declares the pod without:testspecs—iosTests/is never built, so a test there would never run. CI runs all three.Verified locally:
bun test194 pass, typecheck and eslint clean,:react-native-better-maps:assembleDebug+testDebugUnitTestgreen (26 tests),swift testgreen, andxcodebuildon the Google leg (GoogleMapProviderAdapter.oat 907 KB, so the#if canImport(GoogleMaps)code really compiled).Known gaps, documented rather than implied
The README's new "Invalid input" section states them: the
cameraprop is not validated anywhere, and descriptors passed through the bulkmarkersprop are checked on neither side — only the<Marker>child is (that path belongs to #128's scope). Neither crashes; both are follow-ups.Need help on this PR? Tag
@codesmith-botwith what you need. Autofix is disabled.