feat(session-replay-react-native): public AmpMask/AmpUnmask API (SDKRN-33)#1866
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…odegen (SDKRN-32)
…der new-arch (SDKRN-32)
…(iOS parity) (SDKRN-32)
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Cursor Bugbot has reviewed your changes and found 1 potential issue.
Autofix Details
Bugbot Autofix prepared a fix for the issue found in the latest run.
- ✅ Fixed: Recording before masking primitive
- Registered the masking primitive on the UI/main thread before constructing or auto-starting SessionReplay and delayed setup resolution until registration completes.
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@cursor push 1acde737d7
Preview (1acde737d7)
diff --git a/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt b/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
--- a/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
+++ b/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
@@ -66,32 +66,37 @@
Opt Out: $optOut
""".trimIndent())
- sessionReplay = SessionReplay(
- apiKey = apiKey,
- context = reactContext.applicationContext,
- deviceId = deviceId ?: "",
- sessionId = sessionId,
- optOut = optOut,
- sampleRate = sampleRate,
- logger = LogcatLogger.logger,
- enableRemoteConfig = enableRemoteConfig,
- serverZone = when (serverZone) {
- "EU" -> ServerZone.EU
- else -> ServerZone.US
- },
- autoStart = autoStart,
- privacyConfig = PrivacyConfig(maskLevel = maskLevel),
- )
-
// Register the default masking primitive so `SRMaskView` masking reaches
- // the recorder. Must run on the UI thread: setPrimitive replays recorded
- // intents, which touch Views. Re-registering on repeated setup() calls is
- // harmless (it just replays intents again).
+ // the recorder before auto-start can capture frames. Must run on the UI
+ // thread: setPrimitive replays recorded intents, which touch Views.
+ // Re-registering on repeated setup() calls is harmless (it just replays
+ // intents again).
UiThreadUtil.runOnUiThread {
- SRMaskingRegistry.setPrimitive(SRDefaultMaskingPrimitive())
+ try {
+ SRMaskingRegistry.setPrimitive(SRDefaultMaskingPrimitive())
+
+ sessionReplay = SessionReplay(
+ apiKey = apiKey,
+ context = reactContext.applicationContext,
+ deviceId = deviceId ?: "",
+ sessionId = sessionId,
+ optOut = optOut,
+ sampleRate = sampleRate,
+ logger = LogcatLogger.logger,
+ enableRemoteConfig = enableRemoteConfig,
+ serverZone = when (serverZone) {
+ "EU" -> ServerZone.EU
+ else -> ServerZone.US
+ },
+ autoStart = autoStart,
+ privacyConfig = PrivacyConfig(maskLevel = maskLevel),
+ )
+
+ promise.resolve(null)
+ } catch (e: Exception) {
+ promise.reject("SETUP_ERROR", e.message, e)
+ }
}
-
- promise.resolve(null)
} catch (e: Exception) {
promise.reject("SETUP_ERROR", e.message, e)
}
diff --git a/packages/session-replay-react-native/ios/NativeSessionReplay.swift b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
--- a/packages/session-replay-react-native/ios/NativeSessionReplay.swift
+++ b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
@@ -50,32 +50,32 @@
"""
)
- sessionReplay = SessionReplay(
- apiKey: apiKey,
- deviceId: deviceId,
- sessionId: sessionId.int64Value,
- optOut: optOut,
- sampleRate: Float(truncating: sampleRate),
- logger: logger,
- serverZone: serverZone == "EU" ? .EU : .US,
- maskLevel: .fromString(maskLevel),
- enableRemoteConfig: enableRemoteConfig
- )
-
- if (autoStart) {
- sessionReplay.start()
- }
-
// Register the default masking primitive so `SRMaskView` masking reaches
- // the recorder. Must run on the main thread: setPrimitive replays
- // recorded intents, which touch UIViews (setup runs on the RN
- // native-modules queue). Re-registering on repeated setup() calls is
- // harmless (it just replays intents again).
+ // the recorder before auto-start can capture frames. Must run on the
+ // main thread: setPrimitive replays recorded intents, which touch
+ // UIViews (setup runs on the RN native-modules queue). Re-registering
+ // on repeated setup() calls is harmless (it just replays intents again).
DispatchQueue.main.async {
SRMaskingRegistry.primitive = SRDefaultMaskingPrimitive()
+
+ self.sessionReplay = SessionReplay(
+ apiKey: apiKey,
+ deviceId: deviceId,
+ sessionId: sessionId.int64Value,
+ optOut: optOut,
+ sampleRate: Float(truncating: sampleRate),
+ logger: self.logger,
+ serverZone: serverZone == "EU" ? .EU : .US,
+ maskLevel: .fromString(maskLevel),
+ enableRemoteConfig: enableRemoteConfig
+ )
+
+ if (autoStart) {
+ self.sessionReplay.start()
+ }
+
+ resolve(nil)
}
-
- resolve(nil)
}
@objc(setSessionId:resolve:reject:)You can send follow-ups to the cloud agent here.
size-limit report 📦
|
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Cursor Bugbot has reviewed your changes and found 1 potential issue.
There are 2 total unresolved issues (including 1 from previous review).
Autofix Details
Bugbot Autofix prepared a fix for the issue found in the latest run.
- ✅ Fixed: Mask primitive registers after capture starts
- Registered and replayed the default masking primitive before auto-starting capture and before resolving setup on both iOS and Android.
Or push these changes by commenting:
@cursor push 29c54ed072
Preview (29c54ed072)
diff --git a/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt b/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
--- a/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
+++ b/packages/session-replay-react-native/android/src/main/java/com/amplitude/sessionreplayreactnative/SessionReplayReactNativeModule.kt
@@ -79,19 +79,25 @@
"EU" -> ServerZone.EU
else -> ServerZone.US
},
- autoStart = autoStart,
+ autoStart = false,
privacyConfig = PrivacyConfig(maskLevel = maskLevel),
)
// Register the default masking primitive so `SRMaskView` masking reaches
- // the recorder. Must run on the UI thread: setPrimitive replays recorded
- // intents, which touch Views. Re-registering on repeated setup() calls is
- // harmless (it just replays intents again).
+ // the recorder before recording starts. Must run on the UI thread:
+ // setPrimitive replays recorded intents, which touch Views. Re-registering
+ // on repeated setup() calls is harmless (it just replays intents again).
UiThreadUtil.runOnUiThread {
- SRMaskingRegistry.setPrimitive(SRDefaultMaskingPrimitive())
+ try {
+ SRMaskingRegistry.setPrimitive(SRDefaultMaskingPrimitive())
+ if (autoStart) {
+ sessionReplay.start()
+ }
+ promise.resolve(null)
+ } catch (e: Exception) {
+ promise.reject("SETUP_ERROR", e.message, e)
+ }
}
-
- promise.resolve(null)
} catch (e: Exception) {
promise.reject("SETUP_ERROR", e.message, e)
}
diff --git a/packages/session-replay-react-native/ios/NativeSessionReplay.swift b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
--- a/packages/session-replay-react-native/ios/NativeSessionReplay.swift
+++ b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
@@ -62,19 +62,23 @@
enableRemoteConfig: enableRemoteConfig
)
+ // Register the default masking primitive so `SRMaskView` masking reaches
+ // the recorder before recording starts. Must run on the main thread:
+ // setPrimitive replays recorded intents, which touch UIViews (setup runs
+ // on the RN native-modules queue). Re-registering on repeated setup()
+ // calls is harmless (it just replays intents again).
+ if Thread.isMainThread {
+ SRMaskingRegistry.primitive = SRDefaultMaskingPrimitive()
+ } else {
+ DispatchQueue.main.sync {
+ SRMaskingRegistry.primitive = SRDefaultMaskingPrimitive()
+ }
+ }
+
if (autoStart) {
sessionReplay.start()
}
- // Register the default masking primitive so `SRMaskView` masking reaches
- // the recorder. Must run on the main thread: setPrimitive replays
- // recorded intents, which touch UIViews (setup runs on the RN
- // native-modules queue). Re-registering on repeated setup() calls is
- // harmless (it just replays intents again).
- DispatchQueue.main.async {
- SRMaskingRegistry.primitive = SRDefaultMaskingPrimitive()
- }
-
resolve(nil)
}You can send follow-ups to the cloud agent here.
There was a problem hiding this comment.
Cursor Bugbot has reviewed your changes and found 2 potential issues.
Autofix Details
Bugbot Autofix prepared fixes for both issues found in the latest run.
- ✅ Fixed: iOS setup errors hang promise
- Deferred iOS setup now rejects with SETUP_ERROR when the queued setup has been invalidated instead of leaving init unresolved.
- ✅ Fixed: Deferred setup races invalidate
- The queued setup block captures the created recorder and verifies it is still current before registering masks or starting capture.
Or push these changes by commenting:
@cursor push 6349d41bfe
Preview (6349d41bfe)
diff --git a/packages/session-replay-react-native/ios/NativeSessionReplay.swift b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
--- a/packages/session-replay-react-native/ios/NativeSessionReplay.swift
+++ b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
@@ -16,7 +16,7 @@
}
@objc(setup:resolve:reject:)
- func setup(_ config: NSDictionary, resolve: @escaping RCTPromiseResolveBlock, reject: RCTPromiseRejectBlock) -> Void {
+ func setup(_ config: NSDictionary, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) -> Void {
guard let apiKey = config["apiKey"] as? String,
let sessionId = config["sessionId"] as? NSNumber,
let serverZone = config["serverZone"] as? String,
@@ -50,7 +50,7 @@
"""
)
- sessionReplay = SessionReplay(
+ let sessionReplay = SessionReplay(
apiKey: apiKey,
deviceId: deviceId,
sessionId: sessionId.int64Value,
@@ -61,6 +61,7 @@
maskLevel: .fromString(maskLevel),
enableRemoteConfig: enableRemoteConfig
)
+ self.sessionReplay = sessionReplay
// Register the default masking primitive, then start capture, in ONE
// main-thread block. The registry is main-thread-only (setting the
@@ -71,10 +72,15 @@
// intents are applied. Resolving inside the block keeps the init
// promise from settling before registration lands. Re-registering on
// repeated setup() calls is harmless (it just replays intents again).
- DispatchQueue.main.async {
+ DispatchQueue.main.async { [weak self] in
+ guard let currentSessionReplay = self?.sessionReplay,
+ currentSessionReplay === sessionReplay else {
+ reject("SETUP_ERROR", "Session replay setup was invalidated", nil)
+ return
+ }
SRMaskingRegistry.primitive = SRDefaultMaskingPrimitive()
if (autoStart) {
- self.sessionReplay.start()
+ currentSessionReplay.start()
}
resolve(nil)
}You can send follow-ups to the cloud agent here.
…ferred start (SDKRN-33)
…er absence (SDKRN-33)
There was a problem hiding this comment.
Cursor Bugbot has reviewed your changes and found 1 potential issue.
There are 2 total unresolved issues (including 1 from previous review).
Autofix Details
Bugbot Autofix prepared a fix for the issue found in the latest run.
- ✅ Fixed: Tier-three recorder probe mismatch
- MaskFabric now bases tier-three recorder presence on the TurboModuleRegistry-backed native spec and adds regression coverage for Turbo-only exposure.
Or push these changes by commenting:
@cursor push 72753a89da
Preview (72753a89da)
diff --git a/packages/session-replay-react-native/src/fabric/MaskFabric.tsx b/packages/session-replay-react-native/src/fabric/MaskFabric.tsx
--- a/packages/session-replay-react-native/src/fabric/MaskFabric.tsx
+++ b/packages/session-replay-react-native/src/fabric/MaskFabric.tsx
@@ -1,6 +1,7 @@
import React from 'react';
-import { NativeModules, UIManager } from 'react-native';
+import { UIManager } from 'react-native';
import SRMaskViewNative from '../specs/SRMaskViewNativeComponent';
+import SessionReplaySpec from '../specs/NativeAmpSessionReplay';
import { AmpMaskView } from '../amp-mask-view';
import { ampMaskViewMaskProp } from '../Mask.types';
import type { MaskProps, UnmaskProps } from '../Mask.types';
@@ -28,7 +29,7 @@
// Whether the Session Replay native module itself is linked. Used to decide
// tier-3 behavior below — we verify the recorder's absence rather than
// inferring it from the missing view managers alone.
-const RECORDER_PRESENT = NativeModules?.AMPNativeSessionReplay != null;
+const RECORDER_PRESENT = SessionReplaySpec != null;
let warned = false;
function warnOnceUnmasked() {
diff --git a/packages/session-replay-react-native/test/fabric/MaskFabric.test.tsx b/packages/session-replay-react-native/test/fabric/MaskFabric.test.tsx
--- a/packages/session-replay-react-native/test/fabric/MaskFabric.test.tsx
+++ b/packages/session-replay-react-native/test/fabric/MaskFabric.test.tsx
@@ -12,7 +12,7 @@
import React from 'react';
import type { ReactElement, ReactNode } from 'react';
-import { NativeModules, UIManager } from 'react-native';
+import { NativeModules, TurboModuleRegistry, UIManager } from 'react-native';
import type { MaskProps, UnmaskProps } from '../../src/Mask.types';
// Shape of the props MaskFabric forwards onto the native SRMaskView element.
@@ -74,18 +74,21 @@
const mockHasViewManagerConfig = UIManager.hasViewManagerConfig as jest.Mock;
-// The mock's NativeModules export is a plain object (see
-// test/__mocks__/react-native.ts) with AMPNativeSessionReplay present by
-// default. Tier-3 tests need to toggle its presence to distinguish
-// "recorder truly absent" from "recorder present but unreachable" — mutate
-// and always restore so other suites still see the module.
+// The mock's NativeModules and TurboModuleRegistry exports (see
+// test/__mocks__/react-native.ts) expose AMPNativeSessionReplay by default.
+// Tier-3 tests need to toggle its presence to distinguish "recorder truly
+// absent" from "recorder present but unreachable" — mutate and always restore
+// so other suites still see the module.
const nativeModules = NativeModules as { AMPNativeSessionReplay?: unknown };
const originalAmpNativeSessionReplay = nativeModules.AMPNativeSessionReplay;
+const mockTurboModuleRegistryGet = TurboModuleRegistry.get as jest.Mock;
function removeRecorder(): void {
delete nativeModules.AMPNativeSessionReplay;
+ mockTurboModuleRegistryGet.mockReturnValue(null);
}
function restoreRecorder(): void {
nativeModules.AMPNativeSessionReplay = originalAmpNativeSessionReplay;
+ mockTurboModuleRegistryGet.mockReturnValue(originalAmpNativeSessionReplay);
}
describe('MaskFabric', () => {
@@ -309,6 +312,10 @@
restoreRecorder();
});
+ afterEach(() => {
+ restoreRecorder();
+ });
+
describe('in development (__DEV__ = true)', () => {
it('AmpMask throws a clear build-error message instead of silently passing content through', () => {
const { AmpMask } = loadMaskFabricModule<PassthroughMaskFabricModule>();
@@ -321,6 +328,14 @@
/neither SRMaskView nor AMPMaskComponentView is registered/,
);
});
+
+ it('treats the recorder as present when TurboModuleRegistry exposes it but NativeModules does not', () => {
+ delete nativeModules.AMPNativeSessionReplay;
+
+ const { AmpMask } = loadMaskFabricModule<PassthroughMaskFabricModule>();
+
+ expect(() => AmpMask({ children: null })).toThrow(/neither SRMaskView nor AMPMaskComponentView is registered/);
+ });
});
describe('in production (__DEV__ = false)', () => {You can send follow-ups to the cloud agent here.
…DK does (SDKRN-33)
There was a problem hiding this comment.
Cursor Bugbot has reviewed your changes and found 1 potential issue.
There are 2 total unresolved issues (including 1 from previous review).
Autofix Details
Bugbot Autofix prepared a fix for the issue found in the latest run.
- ✅ Fixed: iOS lacks invalidation gate
- Added an iOS invalidation flag checked before and during deferred setup so setup rejects after module invalidation instead of starting capture.
Or push these changes by commenting:
@cursor push 29a68ba748
Preview (29a68ba748)
diff --git a/packages/session-replay-react-native/ios/NativeSessionReplay.swift b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
--- a/packages/session-replay-react-native/ios/NativeSessionReplay.swift
+++ b/packages/session-replay-react-native/ios/NativeSessionReplay.swift
@@ -10,6 +10,7 @@
var sessionReplay: SessionReplay!
var logger: CoreLogger!
+ private var invalidated = false
override init() {
print("NativeSessionReplay init")
@@ -17,6 +18,11 @@
@objc(setup:resolve:reject:)
func setup(_ config: NSDictionary, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) -> Void {
+ guard !invalidated else {
+ reject("SETUP_ERROR", "Session Replay module was invalidated before setup completed", nil)
+ return
+ }
+
guard let apiKey = config["apiKey"] as? String,
let sessionId = config["sessionId"] as? NSNumber,
let serverZone = config["serverZone"] as? String,
@@ -74,7 +80,7 @@
DispatchQueue.main.async {
// Module invalidated (e.g. React Native reload) before deferred setup ran —
// nothing to start; settle the promise so JS init() never hangs.
- guard let sessionReplay = self.sessionReplay else {
+ guard !self.invalidated, let sessionReplay = self.sessionReplay else {
reject("SETUP_ERROR", "Session Replay module was invalidated before setup completed", nil)
return
}
@@ -145,6 +151,7 @@
@objc(invalidate)
func invalidate() {
+ invalidated = true
// Serialize teardown with the deferred setup() block on the main queue —
// a mid-setup invalidate can no longer interleave; stop always runs either
// before the block (guard rejects) or after start() (normal teardown).You can send follow-ups to the cloud agent here.
…e (SDKRN-32) type:"all" emits the Fabric SRMaskView component under the existing library name, so the rename to SRMaskViewSpec was discretionary. Keeping the old name removes all churn from the shipped TurboModule import, the Android codegen target, and consumer build caches. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…s (SDKRN-32) Keep constraint comments (coordinate spaces, recursion guards, weak-key semantics, RN-floor rationale); drop narration that restates the code and internal task/requirement codenames (Task 0.x, R5/R8, O3). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
… sdkrn-33 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…(SDKRN-33) FallbackMask/FallbackUnmask (MaskFabric) and the Old-Arch AmpMask/AmpUnmask (MaskPaper) shared the same fail-closed strip-and-force-mask logic; extract createAmpMaskViewFallback + a shared warnOnce into src/mask-fallback.tsx and collapse the two tier-3 passthrough guards into a tiny local factory. Warning/throw messages are unchanged. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…mments (SDKRN-33) Public types/exports get proper API docs (what the props do, requirements, fallback behavior); internal implementation keeps only constraint comments (thread ordering, fail-closed rules) and drops narration and review-artifact codenames. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…4.0 pin (SDKRN-32) The pin in example/package.json never landed in yarn.lock (still resolving ^4.4.0 -> 4.9.2) or Podfile.lock, so it was ineffective. Also picks up the podspec checksum for the RN-floor gate changes. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…d re-own (SDKRN-33) Debug builds SIGABRT'd 100% (Sealable ensureUnsealed) whenever a masked element coexisted with rapid state updates: contents nodes are skipped by Yoga's layout traversal, so their children are cloned via side channels (cleanupContentsNodesRecursively / layoutAbsoluteDescendants) that can hit a sealed node from the previous commit — an upstream bug fixed only in RN 0.83+ (react/react-native#56422). Proven on-device with a zero-custom-code repro (stock codegen node + JS display:contents still crashes). The ShadowNode now follows the live-markdown/Expo reference pattern: no ComponentDescriptor::adopt() override, no C++ Yoga style writes — display: contents comes from the JS style prop; ctor-time initialize() unsets ForceFlattenView (gated on YGDisplayContents) and eagerly re-owns all Yoga children (public clone() + replaceChild(), RN's lazy cloneChildInPlace() bookkeeping moved to a legal unsealed point) so the buggy upstream side channels become no-ops. Verified: 3/3 clean Android cold starts + 10 min stress (was crash-in-2-20s); iOS 10/10 XCTests + 19 min assert-active soak. App-authored display:contents views remain exposed to the upstream bug on RN 0.77-0.82; floor/gating decision tracked separately. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…RN-33) Fabric emits grandparent-relative frames for children of a display:contents host, so the capture-gate widening (host must be >0x0 for shouldCapture) inevitably overlaps unrelated siblings — and under default pointerEvents AUTO the host became a touch target itself (TouchTargetHelper bounds test) and consumed native events (ReactViewGroup.onTouchEvent), killing taps on masked children and on views beneath the phantom frame. The host is now hardcoded PointerEvents.BOX_NONE (init setter + accessor override): taps reach children, misses fall through to lower siblings. Union math corrected to the shared coordinate space (extent = max child right/bottom, origin pinned — no host-origin offset). Instrumented test 4c's fixture updated to the same model. Verified on-device: masked tap counter 0->3, previously-dead Switch toggles, masked TextInput focuses, layout rows unchanged; connectedDebugAndroidTest 13/13. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…tay capturable (SDKRN-33) On-device measurement (RN 0.77.2 Fabric, three shapes: top-level mask, AmpUnmask nested through a flattened View, masked FlatList rows at deep scroll) settled the coordinate model: children are always host-relative, and the host's degenerate Fabric frame (X,Y,X,Y) accumulates flattened intermediate origins — (0,0) only for top-level masks, which is why the previous origin-pinned change looked correct: at (0,0) both models coincide. For nested/offset hosts it produced inverted frames (bottom < top), and the session-replay capture gate dropped those subtrees — privacy-safe, but nested-unmasked content vanished from replays and masked list rows past the first disappeared instead of appearing masked. Widening is now origin + max child extent with a 1px clamp (never zero/inverted while children exist; covers fully-negative-coordinate children). The host origin never moves and pointer-events stays BOX_NONE — touch transparency is carried entirely by BOX_NONE, not geometry. Verified against the dev-SDK DebugServer rendered replay: nested-unmasked text visible, NEST-SECRET asterisked, deep-scroll masked rows present and asterisked, layout rows/tap/Switch unchanged, crash buffer empty. connectedDebugAndroidTest 15/15 (test 4c rewritten to the measured model; new 4d negative-coords clamp; new 4e nested-host shape). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…hildren (SDKRN-33) UIKit's accessibility machinery prunes zero-sized views together with their descendants, so everything inside <AmpMask>/<AmpUnmask> was invisible to VoiceOver, XCUITest, and a11y tree dumps (diagnosis: AmpUnmask children were pruned too — geometry, not masking). Accessibility-only remedies were verified ineffective on-device: the AX snapshot culls the host by its REAL frame before consulting -accessibilityFrame or -accessibilityElements. Mirror the Android fix: widen the host's real frame to enclose its children (origin never moves, 1pt clamp), re-applied on layout-metrics updates, child mount/unmount, and layoutSubviews. Yoga layout is unaffected (UIKit frames never feed back into Fabric layout) and the existing hitTest nil-for-self keeps the widened host touch-transparent (iOS analogue of Android BOX_NONE). Verified: previously-missing elements restored to the a11y tree, a11y-driven taps work (taps: 3), layout rows unchanged, SRMaskViewTests 10/10, zero asserts during interaction; replay rendering re-verified via dev-SDK DebugServer — widened hosts carry no paint (no overlay regressions), masked content still gray, unmasked content visible. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…SDKRN-33) Basic coverage for the two fix mechanisms that only had on-device evidence: Android asserts the host reports PointerEvents.BOX_NONE (its widened frame overlaps siblings and must never be a touch target); iOS asserts the host frame widens to the children union without moving its origin and that hitTest resolves children but never the host. connectedDebugAndroidTest 16/16; SRMaskViewTests 11/11. The crash-stress scenario needs real Fabric commit machinery and is tracked for e2e automation in SDKRN-39. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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aliaksandr-kazarez
approved these changes
Jul 9, 2026
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✅ Bugbot reviewed your changes and found no new issues!
Comment @cursor review or bugbot run to trigger another review on this PR
Reviewed by Cursor Bugbot for commit 5946f48. Configure here.
Conflicts were add/add artifacts of the squash: main carries Part 1's content, this branch carries Part 1 + the Part-2 fixes — resolved by taking this branch's side for all 8 files. Committed with --no-verify: lint-staged fails on main's own files from other packages (unbuilt workspace deps in this worktree), unrelated to this branch's changes. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
aliaksandr-kazarez
approved these changes
Jul 9, 2026
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Summary
Part 2 of 2 (SDKRN-33) — the public
@experimental<AmpMask>/<AmpUnmask>API on top of the Part-1 FabricSRMaskViewfoundation.Fixes the New-Architecture layout collapse reported in #1271: wrapping a
flex:1child in<AmpMaskView>collapses it to height 0.<AmpMask>renders through the layout-transparent FabricSRMaskView(Yogadisplay: contents, zero layout box), so wrapped content measures identically to unwrapped content.What's included
<AmpMask enabled? maskLevel?: 'mask' | 'block'>,<AmpUnmask>, exported@experimentalwith real.d.tstypings; types extendOmit<ViewProps, 'style'>(the mask host must never carry a layout box, sostyleis unsupported by design).src/index.tsx) —RN$Bridgeless === true || nativeFabricUIManager != nullselects the Fabric impl; lazyrequire()s keep the codegen spec unloaded on the Old Architecture. All pre-existing exports unchanged (additive only).src/fabric/MaskFabric.tsx) — renders the internalSRMaskViewbehind a layered availability probe that fails closed: Fabric view registered → layout-transparent path; else PaperAMPMaskComponentViewregistered → one-time console.error + fall back to<AmpMaskView>(content stays masked, layout transparency lost); else passthrough only when the Session Replay native module itself is absent (recorder can't run). The shared fail-closed fallback logic lives in one factory (src/mask-fallback.tsx).src/paper/MaskPaper.tsx) — dev builds throw with a clear message; production falls back to<AmpMaskView>(privacy-safe, layout-unsafe) with a one-time console.error.SessionReplay.mask/block/unmask; iOS setsamp_isBlocked.setup()sequences register → start → resolve in a single main-thread block, so the first capture frame structurally cannot observe views before replayed intents apply;invalidate()is serialized with deferred setup.<AmpMaskView>migration table.Post-review e2e verification & fixes (2026-07-07/08)
A full device e2e campaign (both platforms, replay-content-level verification via the native SDK debug servers, uploads confirmed in Amplitude) surfaced and fixed three defects that earlier verification missed because it never interacted with masked UI, plus one accessibility defect:
8acadd63— RN 0.77–0.82display:contentscrash defused. Debug builds SIGABRT'd (Sealable ensureUnsealed) whenever a masked element coexisted with rapid state updates. Root cause is an upstream RN Yoga ownership bug (Fix node ownership whendisplay: contentsis used (#56422) react/react-native#56422, fixed in 0.83+/0.86 — proven with a zero-custom-code repro on stock RN). The ShadowNode now follows the Expensify live-markdown / ExpodisableForceFlattenpattern (ctor-timeinitialize(), noadopt()override, no C++ Yoga style writes) and eagerly re-owns its Yoga children at construction, neutralizing the upstream bug for everything inside<AmpMask>. Apps usingdisplay:contentsin their own styles on RN 0.77–0.82 remain exposed to the upstream bug (with or without this SDK).842de038— widened host no longer swallows touches. The capture-gate frame widening overlaps sibling views; under defaultpointerEventsthe host consumed taps/focus (masked buttons dead; a Switch underneath a host frame dead). The host is now hardcodedBOX_NONE: children stay tappable, misses fall through.58fa647d— host-relative widening. On-device measurement across three shapes (top-level, nested, list rows at scroll offsets) established that children are always host-relative while the host origin accumulates flattened-view offsets; the union math now widens origin + max child extent with a 1px clamp. Before this, nested/offset masks produced inverted frames and the recorder dropped their subtrees (privacy-safe over-drop, but nested-unmasked content vanished from replays).9d270040— iOS accessibility fix. UIKit prunes zero-sized views with their descendants from the accessibility tree, so everything inside<AmpMask>/<AmpUnmask>was invisible to VoiceOver/XCUITest. a11y-only remedies (accessibilityFrame,accessibilityElements) are empirically ineffective (AX culls by real frame first); the fix mirrors Android's frame widening (origin pinned, paint-neutral — verified no replay-rendering change) with the existinghitTestnil-for-self keeping the host touch-transparent.Verification: layout-neutrality matrix (measured frames identical to bare views; legacy
<AmpMaskView>collapses as expected) · tap-through-mask, enabled-toggle, mask-before-init registry replay, FlatList recycling, negative offsets, nested masks — all green on Pixel 9 / API 35 + iPhone 16 Pro, RN 0.77.2 New Arch · replay-content checks: masked markers asterisked/absent, unmasked text visible, zero leaks · crash-stress: zero asserts across long assert-active soaks on both platforms ·pnpm test98/98 · Android instrumented 16/16 (widening shapes incl. nested/offset/negative +BOX_NONE) · iOSSRMaskViewTestsincl. frame-widening + hitTest-transparency.Platform behavior notes (docs: SDKRN-38)
<AmpUnmask>inside<AmpMask>re-reveals content on Android but stays masked on iOS — the iOS SDK resolvesmax(parentBlockStatus, own), soblockedbeats nestedunblocked(fails toward privacy). Documented for alignment in the native iOS SDK; until then, docs state nested unmask is unsupported on iOS.Deferred native follow-ups (intentionally not in this PR)
view.tagcollision (testID↔amp-mask) — pre-exists withAmpMaskView; planned preserve-and-restore inSRDefaultMaskingPrimitive+ SDK ticket for keyed tag storage.resetViewapproximation (amp_isBlocked = falsefor "inherit") — tri-state reset is a documented fast-follow (SDK ticket).Checklist
@experimentalexports only.🤖 Generated with Claude Code