Adds list and list item roles #164809

chunhtai · 2025-03-07T19:49:13Z

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.

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yjbanov · 2025-03-07T21:55:39Z

engine/src/flutter/lib/web_ui/lib/src/engine/semantics/list.dart

+///
+/// Uses aria list role to convey this semantic information to the element.
+///
+/// Screen-readers takes advantage of "aria-label" to describe the visual.


nit: s/takes/take/

yjbanov · 2025-03-07T21:55:51Z

engine/src/flutter/lib/web_ui/lib/src/engine/semantics/list.dart

+  bool focusAsRouteDefault() => focusable?.focusAsRouteDefault() ?? false;
+}
+
+/// Indicates a item in a list.


nit: s/a item/an item/

yjbanov · 2025-03-07T21:56:05Z

engine/src/flutter/lib/web_ui/lib/src/engine/semantics/list.dart

+///
+/// Uses aria listitem role to convey this semantic information to the element.
+///
+/// Screen-readers takes advantage of "aria-label" to describe the visual.


nit: s/takes/take/

yjbanov · 2025-03-07T21:58:33Z

engine/src/flutter/lib/web_ui/lib/src/engine/semantics/semantics.dart

@@ -443,6 +444,12 @@ enum EngineSemanticsRole {
  /// A cell in a [table] contains header information for a column.
  columnHeader,

+  /// A container that display its children in a list layout.


nit: s/display/displays/

Instead of saying "list layout" (how is a list laid out? can it be horizontal?), consider saying "...whose children are logically a list of items". We should also probably explain that it is expected that each child node has the role [listItem].

yjbanov · 2025-03-07T21:59:37Z

engine/src/flutter/lib/web_ui/lib/src/engine/semantics/semantics.dart

+  /// A container that display its children in a list layout.
+  list,
+
+  /// An item in a [list].


Does listItem need to be a direct child of a list? We have a similar situation/problem with tables.

yes, it has the same problem, so I think @hannah-hyj 's pr will help fix this issue

Cool. Do we want to document and/or enforce the relationship in the node structure somehow?

for semanticsnode, yes we have check in framework side. i.e. _semanticsListItem

or do you meant in dom structure?

A check in the framework is probably good enough, and it's probably easier to maintain there.

packages/flutter/lib/src/semantics/semantics.dart

auto-submit · 2025-03-12T19:42:32Z

autosubmit label was removed for flutter/flutter/164809, because - The status or check suite Linux_android_emu android_engine_vulkan_tests has failed. Please fix the issues identified (or deflake) before re-applying this label.

auto-submit · 2025-03-13T16:26:19Z

autosubmit label was removed for flutter/flutter/164809, because Pull request flutter/flutter/164809 is not in a mergeable state.

chunhtai force-pushed the issues/162121 branch from c03d767 to 8716037 Compare March 7, 2025 20:00

github-actions bot added framework flutter/packages/flutter repository. See also f: labels. engine flutter/engine repository. See also e: labels. a: accessibility Accessibility, e.g. VoiceOver or TalkBack. (aka a11y) platform-web Web applications specifically labels Mar 7, 2025

chunhtai requested a review from yjbanov March 7, 2025 21:54

yjbanov reviewed Mar 7, 2025

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chunhtai requested a review from yjbanov March 7, 2025 22:17

github-actions bot added the f: routes Navigator, Router, and related APIs. label Mar 8, 2025

yjbanov reviewed Mar 11, 2025

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yjbanov approved these changes Mar 11, 2025

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chunhtai force-pushed the issues/162121 branch from abaec45 to dbc568b Compare March 12, 2025 18:51

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Roll Flutter from b16430b2fd57 to d05bba1c41f6 (99 revisions) flutter/packages#8883

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Roll Flutter from b16430b2fd57 to d05bba1c41f6 (99 revisions) flutter/packages#8884

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Roll Flutter from b16430b2fd57 to 082a761570e8 (101 revisions) flutter/packages#8886

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chunhtai commented Mar 7, 2025

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