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Fix SliverMainAxisGroup.cacheOrigin - #175760
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This pull request fixes an issue with SliverMainAxisGroup.cacheOrigin by adopting the same cache calculation logic used in RenderViewport. The changes in sliver_group.dart appear to correctly implement this more robust logic for handling cache origin and extent for child slivers. The new test case in sliver_main_axis_group_test.dart effectively validates this fix. I've added a couple of suggestions to improve floating-point precision handling for consistency within the class.
| constraints.remainingCacheExtent - | ||
| calculateCacheOffset(constraints, from: 0.0, to: scrollOffset), | ||
| ), | ||
| remainingCacheExtent: math.max(0.0, remainingCacheExtent + cacheExtentCorrection), |
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For consistency with other calculations in this file that deal with extents, consider wrapping the remainingCacheExtent calculation with _fixPrecisionError to avoid potential floating-point inaccuracies near zero. This would align it with how overlap and remainingPaintExtent are handled.
remainingCacheExtent: math.max(0.0, _fixPrecisionError(remainingCacheExtent + cacheExtentCorrection)),| maxScrollObstructionExtent += childLayoutGeometry.maxScrollObstructionExtent; | ||
| paintOffset = math.max(childPaintOffset + childLayoutGeometry.paintExtent, paintOffset); | ||
| if (childLayoutGeometry.cacheExtent != 0.0) { | ||
| remainingCacheExtent -= childLayoutGeometry.cacheExtent - cacheExtentCorrection; |
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To prevent potential floating-point precision issues, which can be tricky with extent calculations, consider wrapping this calculation in _fixPrecisionError. This would be consistent with how other extent subtractions are handled in this class.
remainingCacheExtent = _fixPrecisionError(remainingCacheExtent - (childLayoutGeometry.cacheExtent - cacheExtentCorrection));
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Hi @Renzo-Olivares, just bumping this PR for your review. Happy to help if anything is unclear. |
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@manu-sncf, thank you for bumping this and I appreciate your patience. I'll take a look this week. |
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LGTM, thank you for the fix!
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I think this looks fine, just some question
| ); | ||
|
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| final double childScrollOffset = math.max(0.0, constraints.scrollOffset - scrollOffset); | ||
| final double correctedCacheOrigin = math.max(cacheOrigin, -childScrollOffset); |
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is there a case this will be bounded to -childScrollOffset ?
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I don't think so. This case only handles a double-precision issue to prevent childScrollOffset from being less than cacheOrigin.
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Roll Flutter from 2d34167 to 75004a6 (39 revisions) flutter/flutter@2d34167...75004a6 2025-10-22 [email protected] [Impeller] Add the paint color to the key of the text shadow cache (flutter/flutter#177140) 2025-10-22 [email protected] Roll Skia from 96e75ca8e24b to 928b5cf727c1 (2 revisions) (flutter/flutter#177387) 2025-10-22 [email protected] Roll reclient to version 185 (flutter/flutter#177293) 2025-10-22 [email protected] Roll Skia from b157f6b95f95 to 96e75ca8e24b (4 revisions) (flutter/flutter#177366) 2025-10-22 [email protected] Fix InputDatePickerFormField does not inherit local InputDecorationTheme (flutter/flutter#177090) 2025-10-22 [email protected] Roll Skia from 2c6162c977db to b157f6b95f95 (2 revisions) (flutter/flutter#177362) 2025-10-22 [email protected] Roll Skia from cadf8e7e6fca to 2c6162c977db (4 revisions) (flutter/flutter#177359) 2025-10-22 [email protected] Cleanup after -news_toolkit, +google_fonts, and some leftover `team-go_router` (flutter/flutter#176841) 2025-10-21 [email protected] don't break sheet's snap from physics (flutter/flutter#171157) 2025-10-21 [email protected] Roll Dart SDK from 913c2ae1b367 to c23010c4f9e6 (8 revisions) (flutter/flutter#177348) 2025-10-21 [email protected] Fix typo in comment about screen availibility (flutter/flutter#177168) 2025-10-21 [email protected] Fix(AnimatedScrollView): exclude outgoing items in removeAllItems (flutter/flutter#176452) 2025-10-21 [email protected] Enable deprecated_member_use_from_same_package for all packages containing tests of Dart fixes defined within the package (flutter/flutter#177341) 2025-10-21 [email protected] Roll Skia from 19bff385f7e8 to cadf8e7e6fca (3 revisions) (flutter/flutter#177331) 2025-10-21 [email protected] Revert "[Android 16] Update `android_engine_vulkan_tests` to Test Against SDK 36 Emulator" (flutter/flutter#177292) 2025-10-21 [email protected] Fix SliverMainAxisGroup.cacheOrigin (flutter/flutter#175760) 2025-10-21 [email protected] Roll Skia from 75c756e029c9 to 19bff385f7e8 (3 revisions) (flutter/flutter#177316) 2025-10-21 [email protected] Fix typo in overlay.dart documentation comment (flutter/flutter#176612) 2025-10-21 [email protected] [ Tool ] Output DTD URI for Flutter web applications (flutter/flutter#177310) 2025-10-21 [email protected] Roll Skia from 982988b472a4 to 75c756e029c9 (1 revision) (flutter/flutter#177305) 2025-10-21 [email protected] Roll Skia from 42ff13a91c80 to 982988b472a4 (8 revisions) (flutter/flutter#177300) 2025-10-21 [email protected] Fix DateRangePickerDialog does not inherit local InputDecorationTheme (flutter/flutter#177086) 2025-10-21 [email protected] Remove references to dart:_js_annotations (flutter/flutter#176698) 2025-10-20 [email protected] Make `FlutterSceneLifeCycleProvider.sceneLifeCycleDelegate` readonly (flutter/flutter#177240) 2025-10-20 [email protected] Make sure that a CupertinoDesktopTextSelectionToolbar doesn't crash i… (flutter/flutter#173964) 2025-10-20 [email protected] Make sure that a BottomSheet doesn't crash in 0x0 environment (flutter/flutter#172229) 2025-10-20 [email protected] Move the Fuchsia SDK to //third_party/fuchsia-sdk (flutter/flutter#177118) 2025-10-20 [email protected] Roll Skia from 641994569415 to 42ff13a91c80 (8 revisions) (flutter/flutter#177283) 2025-10-20 [email protected] Make sure that a NavigationDrawer doesn't crash in 0x0 environment (flutter/flutter#176951) 2025-10-20 [email protected] Fix ink features painting in TabBar. (flutter/flutter#177155) 2025-10-20 [email protected] Make sure that SimpleDialog and SimpleDialogOption do not crash in 0x0 environment (flutter/flutter#174229) 2025-10-20 [email protected] Fix ink features painting in YearPicker. (flutter/flutter#177014) 2025-10-20 [email protected] Update `image.error_builder.0.dart` to replace the emoji with some text (flutter/flutter#176886) 2025-10-20 [email protected] Roll Skia from ed4294faecde to 641994569415 (4 revisions) (flutter/flutter#177264) 2025-10-20 [email protected] Remove redundant name field form `TargetPlatform` and `XCDeviceEventInterface` enums (flutter/flutter#176890) 2025-10-20 [email protected] Added support to pass in texture type while creating textures. (flutter/flutter#175376) 2025-10-20 [email protected] Roll Packages from 3747006 to d113bbc (6 revisions) (flutter/flutter#177270) 2025-10-20 [email protected] Roll Dart SDK from 2cd2106f2cef to 913c2ae1b367 (2 revisions) (flutter/flutter#177258) 2025-10-20 [email protected] Added link to ClipRect from ImageFilter in the docstring (flutter/flutter#177196) 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 is aware of the problem. ...
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Fix flutter#175759 The fix involves using the same logic for cache calculation on RenderViewport. ## 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. - [X] 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.
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Roll Flutter from 2d34167 to 75004a6 (39 revisions) flutter/flutter@2d34167...75004a6 2025-10-22 [email protected] [Impeller] Add the paint color to the key of the text shadow cache (flutter/flutter#177140) 2025-10-22 [email protected] Roll Skia from 96e75ca8e24b to 928b5cf727c1 (2 revisions) (flutter/flutter#177387) 2025-10-22 [email protected] Roll reclient to version 185 (flutter/flutter#177293) 2025-10-22 [email protected] Roll Skia from b157f6b95f95 to 96e75ca8e24b (4 revisions) (flutter/flutter#177366) 2025-10-22 [email protected] Fix InputDatePickerFormField does not inherit local InputDecorationTheme (flutter/flutter#177090) 2025-10-22 [email protected] Roll Skia from 2c6162c977db to b157f6b95f95 (2 revisions) (flutter/flutter#177362) 2025-10-22 [email protected] Roll Skia from cadf8e7e6fca to 2c6162c977db (4 revisions) (flutter/flutter#177359) 2025-10-22 [email protected] Cleanup after -news_toolkit, +google_fonts, and some leftover `team-go_router` (flutter/flutter#176841) 2025-10-21 [email protected] don't break sheet's snap from physics (flutter/flutter#171157) 2025-10-21 [email protected] Roll Dart SDK from 913c2ae1b367 to c23010c4f9e6 (8 revisions) (flutter/flutter#177348) 2025-10-21 [email protected] Fix typo in comment about screen availibility (flutter/flutter#177168) 2025-10-21 [email protected] Fix(AnimatedScrollView): exclude outgoing items in removeAllItems (flutter/flutter#176452) 2025-10-21 [email protected] Enable deprecated_member_use_from_same_package for all packages containing tests of Dart fixes defined within the package (flutter/flutter#177341) 2025-10-21 [email protected] Roll Skia from 19bff385f7e8 to cadf8e7e6fca (3 revisions) (flutter/flutter#177331) 2025-10-21 [email protected] Revert "[Android 16] Update `android_engine_vulkan_tests` to Test Against SDK 36 Emulator" (flutter/flutter#177292) 2025-10-21 [email protected] Fix SliverMainAxisGroup.cacheOrigin (flutter/flutter#175760) 2025-10-21 [email protected] Roll Skia from 75c756e029c9 to 19bff385f7e8 (3 revisions) (flutter/flutter#177316) 2025-10-21 [email protected] Fix typo in overlay.dart documentation comment (flutter/flutter#176612) 2025-10-21 [email protected] [ Tool ] Output DTD URI for Flutter web applications (flutter/flutter#177310) 2025-10-21 [email protected] Roll Skia from 982988b472a4 to 75c756e029c9 (1 revision) (flutter/flutter#177305) 2025-10-21 [email protected] Roll Skia from 42ff13a91c80 to 982988b472a4 (8 revisions) (flutter/flutter#177300) 2025-10-21 [email protected] Fix DateRangePickerDialog does not inherit local InputDecorationTheme (flutter/flutter#177086) 2025-10-21 [email protected] Remove references to dart:_js_annotations (flutter/flutter#176698) 2025-10-20 [email protected] Make `FlutterSceneLifeCycleProvider.sceneLifeCycleDelegate` readonly (flutter/flutter#177240) 2025-10-20 [email protected] Make sure that a CupertinoDesktopTextSelectionToolbar doesn't crash i… (flutter/flutter#173964) 2025-10-20 [email protected] Make sure that a BottomSheet doesn't crash in 0x0 environment (flutter/flutter#172229) 2025-10-20 [email protected] Move the Fuchsia SDK to //third_party/fuchsia-sdk (flutter/flutter#177118) 2025-10-20 [email protected] Roll Skia from 641994569415 to 42ff13a91c80 (8 revisions) (flutter/flutter#177283) 2025-10-20 [email protected] Make sure that a NavigationDrawer doesn't crash in 0x0 environment (flutter/flutter#176951) 2025-10-20 [email protected] Fix ink features painting in TabBar. (flutter/flutter#177155) 2025-10-20 [email protected] Make sure that SimpleDialog and SimpleDialogOption do not crash in 0x0 environment (flutter/flutter#174229) 2025-10-20 [email protected] Fix ink features painting in YearPicker. (flutter/flutter#177014) 2025-10-20 [email protected] Update `image.error_builder.0.dart` to replace the emoji with some text (flutter/flutter#176886) 2025-10-20 [email protected] Roll Skia from ed4294faecde to 641994569415 (4 revisions) (flutter/flutter#177264) 2025-10-20 [email protected] Remove redundant name field form `TargetPlatform` and `XCDeviceEventInterface` enums (flutter/flutter#176890) 2025-10-20 [email protected] Added support to pass in texture type while creating textures. (flutter/flutter#175376) 2025-10-20 [email protected] Roll Packages from 3747006 to d113bbc (6 revisions) (flutter/flutter#177270) 2025-10-20 [email protected] Roll Dart SDK from 2cd2106f2cef to 913c2ae1b367 (2 revisions) (flutter/flutter#177258) 2025-10-20 [email protected] Added link to ClipRect from ImageFilter in the docstring (flutter/flutter#177196) 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 is aware of the problem. ...
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Fix #175759
The fix involves using the same logic for cache calculation on RenderViewport.
Pre-launch Checklist
///).