[a11y] fix table semantics cache for cells #177073
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This pull request addresses an accessibility issue by fixing a caching mechanism for table cell semantics. The _Index class, used as a key for caching, is correctly converted into an immutable value type with proper == and hashCode implementations. This ensures that caching works as intended. I've suggested a small improvement to make the operator== implementation more concise and idiomatic.
chunhtai
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Oct 16, 2025
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LGTM, left a comment about the test
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autosubmit label was removed for flutter/flutter/177073, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label. |
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autosubmit label was removed for flutter/flutter/177073, because - The status or check suite Google testing has failed. Please fix the issues identified (or deflake) before re-applying this label. |
Update table.dart Update table.dart
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Roll Flutter from a873a27 to 891d7d5 (32 revisions) flutter/flutter@a873a27...891d7d5 2025-10-18 engine-flutter-autoroll@skia.org Roll Skia from b4981b621a54 to 74df18176924 (1 revision) (flutter/flutter#177204) 2025-10-18 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from ZHuhfPyyV-LcKDLRh... to M8WT2GMY46e_0fFho... (flutter/flutter#177200) 2025-10-18 59215665+davidhicks980@users.noreply.github.com [material/dropdown_menu.dart] Refactor _RenderDropdownMenuBody.computeDryLayout (flutter/flutter#176503) 2025-10-18 engine-flutter-autoroll@skia.org Roll Skia from 579c72d673dd to b4981b621a54 (2 revisions) (flutter/flutter#177199) 2025-10-17 engine-flutter-autoroll@skia.org Roll Skia from 89a8bc508a7c to 579c72d673dd (15 revisions) (flutter/flutter#177194) 2025-10-17 paulberry@google.com [test_fixes] Enable `deprecated_member_use_from_same_package`. (flutter/flutter#177183) 2025-10-17 jhy03261997@gmail.com [a11y] fix table semantics cache for cells (flutter/flutter#177073) 2025-10-17 mdebbar@google.com [web] Self-cleaning service worker (flutter/flutter#176834) 2025-10-17 engine-flutter-autoroll@skia.org Manual roll Skia from 2d9df7c70b6f to 89a8bc508a7c (24 revisions) (flutter/flutter#177182) 2025-10-17 matt.kosarek@canonical.com Fixing WindowManagerTest::DialogCanNeverBeFullscreen possibly hanging (flutter/flutter#177179) 2025-10-17 jhy03261997@gmail.com [VPAT][A11y][a11y-app] Add a text label to slider. (flutter/flutter#177130) 2025-10-17 engine-flutter-autoroll@skia.org Manual roll Dart SDK from a4485e5ef821 to a66f334fee2a (5 revisions) (flutter/flutter#177142) 2025-10-17 jhy03261997@gmail.com [web][a11y] Fix the semantics tree reconstruction logic when a subtree is reparented to another node. (flutter/flutter#177069) 2025-10-17 rmolivares@renzo-olivares.dev `SelectableRegion` should use flutter rendered menu on the web for Android and iOS (flutter/flutter#177122) 2025-10-17 kazbek.sultanov.doc@gmail.com Refactor: Convert Title widget to StatefulWidget (flutter/flutter#176010) 2025-10-17 jessiewong401@gmail.com Bump AGP, KGP, Gradle Templates (flutter/flutter#176858) 2025-10-17 engine-flutter-autoroll@skia.org Roll Packages from 835dccb to 3747006 (3 revisions) (flutter/flutter#177170) 2025-10-17 codefu@google.com Mark windows_unopt test as flakey (flutter/flutter#177173) 2025-10-17 rmolivares@renzo-olivares.dev Tapping outside of `SelectableRegion` should dismiss the selection (flutter/flutter#176843) 2025-10-17 engine-flutter-autoroll@skia.org Roll Fuchsia Linux SDK from _dd0Jv50H0oUI2Ad8... to ZHuhfPyyV-LcKDLRh... (flutter/flutter#177137) 2025-10-17 jason-simmons@users.noreply.github.com Manual roll Dart to a4485e5ef821 (3.11.0-25.0.dev) (flutter/flutter#177132) 2025-10-17 ahmedsameha1@gmail.com Make sure that a MenuAcceleratorLabel doesn't crash in 0x0 environment (flutter/flutter#176646) 2025-10-16 ahmedsameha1@gmail.com Make sure that a NavigationRail doesn't crash in 0x0 environment (flutter/flutter#177022) 2025-10-16 ahmedsameha1@gmail.com Make sure that a SubmenuButton doesn't crash in 0x0 environment (flutter/flutter#176535) 2025-10-16 mail@leuchte.net Fix typo in ButtonBar documentation (flutter/flutter#177078) 2025-10-16 ahmedsameha1@gmail.com Make sure that an InkResponse doesn't crash in 0x0 environment (flutter/flutter#175426) 2025-10-16 jessiewong401@gmail.com [Gradle 9] Resolve Gradle 9 Deprecations in flutter/flutter part 1 (flutter/flutter#176865) 2025-10-16 1063596+reidbaker@users.noreply.github.com Revert "Resolve resolve native Flutter dependencies in Android Studio (#167332)" (flutter/flutter#177053) 2025-10-16 engine-flutter-autoroll@skia.org Manual roll Dart SDK from 2d8e0359a767 to 25b6094026e4 (5 revisions) (flutter/flutter#177109) 2025-10-16 maxenceb1207@gmail.com Add textfield prop to SearchAnchor (flutter/flutter#174497) 2025-10-16 p1318k@gmail.com Fix crash when NSAttributedString is passed to insertText on macOS (flutter/flutter#176329) 2025-10-16 jmccandless@google.com Correct basque time format (flutter/flutter#177031) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC stuartmorgan@google.com,tarrinneal@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md ...
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will fix flutter#170575 The issue is caused by: when caching the cell wrapper semantics nodes in table, it's using cell index to cache them in a map. But the cell index class was not set to immutable and override the `==`, so the cache logic was wrong, they were always creating new semantics nodes for cell wrapper. fixing this by fixing the index class to an immutable value type with proper == and hashCode ## Pre-launch Checklist - [ ] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [ ] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [ ] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [ ] I signed the [CLA]. - [ ] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [ ] I added new tests to check the change I am making, or this PR is [test-exempt]. - [ ] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [ ] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. **Note**: The Flutter team is currently trialing the use of [Gemini Code Assist for GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code). Comments from the `gemini-code-assist` bot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md
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will fix #170575
The issue is caused by:
when caching the cell wrapper semantics nodes in table, it's using cell index to cache them in a map. But the cell index class was not set to immutable and override the
==, so the cache logic was wrong, they were always creating new semantics nodes for cell wrapper.fixing this by fixing the index class to an immutable value type with proper == and hashCode
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.
Note: The Flutter team is currently trialing the use of Gemini Code Assist for GitHub. Comments from the
gemini-code-assistbot should not be taken as authoritative feedback from the Flutter team. If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed.