Fix the issue of over-scrolling in SliverMainAxisGroup with a PinnedHeaderSliver. #173349
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This pull request addresses an over-scrolling issue with SliverMainAxisGroup containing a PinnedHeaderSliver. The fix correctly tracks maxScrollObstructionExtent and uses it to adjust paint offsets, preventing visual overflow. A solid regression test is included to verify this behavior. The changes appear correct and effectively solve the described problem. I have one suggestion to improve the readability of a complex conditional statement.
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| if (childLayoutGeometry.paintExtent > remainingExtent || | ||
| (maxScrollObstructionExtent > remainingExtent && | ||
| childLayoutGeometry.maxScrollObstructionExtent > 0)) { |
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To improve readability, consider extracting the parts of this complex condition into well-named boolean variables. This makes the logic easier to understand at a glance.1
final bool childIsTooLarge = childLayoutGeometry.paintExtent > remainingExtent;
final bool pinnedHeadersOverflow = maxScrollObstructionExtent > remainingExtent;
final bool childIsPinnedHeader = childLayoutGeometry.maxScrollObstructionExtent > 0;
if (childIsTooLarge || (pinnedHeadersOverflow && childIsPinnedHeader)) {
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sliver group fix
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autosubmit label was removed for flutter/flutter/173349, 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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Roll Flutter from e2a347b14a18 to 34c2a3b158b2 (41 revisions) flutter/flutter@e2a347b...34c2a3b 2025-08-13 [email protected] [ Tool ] Mark Linux_pixel_7pro linux_chrome_dev_mode as bringup (flutter/flutter#173646) 2025-08-13 [email protected] [ Widget Preview ] Move `--dtd-url` from a global flag to a `widget-preview start` option (flutter/flutter#173712) 2025-08-13 [email protected] Null aware elements clean-ups (flutter/flutter#173074) 2025-08-13 [email protected] Roll Skia from 29e3e1ab7f62 to f7fdda3cd0e6 (3 revisions) (flutter/flutter#173709) 2025-08-13 [email protected] Regular windows win32 engine (flutter/flutter#173424) 2025-08-13 [email protected] Roll Dart SDK from a098cb676fd6 to 73153bdc1459 (1 revision) (flutter/flutter#173708) 2025-08-13 [email protected] Roll Fuchsia Linux SDK from vgv-rTf7i9PfcDq2Y... to I1TfNmsqTp7t3rO8e... (flutter/flutter#173690) 2025-08-13 [email protected] Roll Skia from 1170405c30cf to 29e3e1ab7f62 (2 revisions) (flutter/flutter#173689) 2025-08-13 [email protected] Roll Dart SDK from e2b7aec7333e to a098cb676fd6 (4 revisions) (flutter/flutter#173683) 2025-08-13 [email protected] Roll Skia from d06fdf03c6a1 to 1170405c30cf (4 revisions) (flutter/flutter#173681) 2025-08-13 [email protected] Roll Skia from 9ed4b4e53db2 to d06fdf03c6a1 (11 revisions) (flutter/flutter#173661) 2025-08-12 [email protected] Fix GTK redraw call being called from non-GTK thread. (flutter/flutter#173602) 2025-08-12 [email protected] [Impeller] Apply Y coordinate scaling when sampling from the destination texture in framebuffer advanced blends (flutter/flutter#173639) 2025-08-12 [email protected] Fix directional focus in nested scrollables with different axis (flutter/flutter#172875) 2025-08-12 [email protected] [ios][tools]do not log "bonjour not found" at all (unless verbose) (flutter/flutter#173569) 2025-08-12 [email protected] Remove jetifier usages (flutter/flutter#173548) 2025-08-12 [email protected] [ Tool ] Fix run_linux_chrome_dev_mode (flutter/flutter#173647) 2025-08-12 [email protected] [ios] Update iOS code signing CIPD instruction command (flutter/flutter#171173) 2025-08-12 [email protected] Reapply "Make device debuggable if useDwdsWebSocketConnection is true … (#173551)" (flutter/flutter#173628) 2025-08-12 [email protected] Roll Clang to 8c7a2ce01a77c96028fe2c8566f65c45ad9408d3 (flutter/flutter#173429) 2025-08-12 [email protected] [web] Fallback to CanvasKit when WebGL is not available (flutter/flutter#173629) 2025-08-12 [email protected] Roll Packages from a114ac2 to 08a9b2c (3 revisions) (flutter/flutter#173625) 2025-08-12 [email protected] [ Tool ] Fix crash from possible DDS startup race (flutter/flutter#173362) 2025-08-12 [email protected] Roll Skia from a2936eff2179 to 9ed4b4e53db2 (3 revisions) (flutter/flutter#173611) 2025-08-12 49699333+dependabot[bot]@users.noreply.github.com Bump actions/checkout from 4 to 5 in the all-github-actions group (flutter/flutter#173606) 2025-08-12 [email protected] Roll Dart SDK from c5fe48aee60d to e2b7aec7333e (1 revision) (flutter/flutter#173604) 2025-08-12 [email protected] Roll Skia from 44bb9d908ee4 to a2936eff2179 (21 revisions) (flutter/flutter#173603) 2025-08-12 [email protected] Fix the issue of over-scrolling in SliverMainAxisGroup with a PinnedHeaderSliver. (flutter/flutter#173349) 2025-08-12 [email protected] Roll Dart SDK from b2a23936f968 to c5fe48aee60d (2 revisions) (flutter/flutter#173596) 2025-08-11 [email protected] Update CanRenderTiledTexture unit tests (flutter/flutter#173553) 2025-08-11 [email protected] Update integration test for iOS deployment workflows (flutter/flutter#173566) 2025-08-11 [email protected] Enables vulkan for PowerVR B-Series (flutter/flutter#173561) 2025-08-11 98614782+auto-submit[bot]@users.noreply.github.com Reverts "Reapply "Make device debuggable if useDwdsWebSocketConnection is true … (#173551)" (#173568)" (flutter/flutter#173587) 2025-08-11 [email protected] Roll Dart SDK from 8e882349fcab to b2a23936f968 (2 revisions) (flutter/flutter#173571) 2025-08-11 [email protected] Reapply "Make device debuggable if useDwdsWebSocketConnection is true … (#173551)" (flutter/flutter#173568) 2025-08-11 [email protected] Update CI iOS tests (flutter/flutter#173563) 2025-08-11 [email protected] Roll Packages from 34948d1 to a114ac2 (4 revisions) (flutter/flutter#173556) 2025-08-11 [email protected] Roll Fuchsia Linux SDK from HclTm0V8hgSpfqmtG... to vgv-rTf7i9PfcDq2Y... (flutter/flutter#173505) 2025-08-11 [email protected] Roll Dart SDK from 6a7ae1ffd1c9 to 8e882349fcab (2 revisions) (flutter/flutter#173499) 2025-08-11 [email protected] Update `ExpansibleController` in `ExpansionTile` `didUpdateWidget` (flutter/flutter#173175) 2025-08-11 [email protected] add format cmd to tools instruction (flutter/flutter#173428) 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 [email protected],[email protected] on the revert to ensure that a human ...
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…eaderSliver. (flutter#173349) Fixes: flutter#173274 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] 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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…eaderSliver. (flutter#173349) Fixes: flutter#173274 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] 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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…eaderSliver. (flutter#173349) Fixes: flutter#173274 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] 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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…eaderSliver. (flutter#173349) Fixes: flutter#173274 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] 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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Fixes: #173274
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
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