OverlayPortal.overlayChildLayoutBuilder
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Such that nobody `implements` it. Currently it has private APIs used by the `RenderObject` class (e.g., the dirty lists). If someone were to implement a `PipelineOwner` outside of object.dart, they will get a runtime crash since they won't be able to provide those private APIs and RenderObjects actually expect those APIs to exist.
This allows `overlyChild` to inspect the layout of the regular child (for example, computing the size and the paint transform from the Overlay to the regular child in `overlayChild`'s performLayout method).
…ays-add-to-dirty-list
…nt-transform-builder
…nt-transform-builder
…ays-add-to-dirty-list
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…tal-paint-transform-builder
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OverlayPortal.overlayChildLayoutBuilder (placeholder name)OverlayPortal.overlayChildLayoutBuilder
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… (#8922) Manual roll Flutter from b16430b2fd57 to 1d954f4e96bd (114 revisions) Manual roll requested by [email protected] flutter/flutter@b16430b...1d954f4 2025-03-17 [email protected] Revert "[skwasm] Dynamic Threading (#164748)" (flutter/flutter#165350) 2025-03-17 [email protected] Roll Skia from fa669e2e6d12 to 52130e5c3b34 (4 revisions) (flutter/flutter#165348) 2025-03-17 [email protected] `OverlayPortal.childLayoutBuilder` should rebuild when `OverlayPortal` rebuilds. (flutter/flutter#165331) 2025-03-17 [email protected] [web][a11y]Delete _childContainerElement (flutter/flutter#163662) 2025-03-17 [email protected] Roll Skia from e45207898e60 to fa669e2e6d12 (8 revisions) (flutter/flutter#165342) 2025-03-17 [email protected] Add documentation for Java test filtering to plugins test document (flutter/flutter#165314) 2025-03-17 [email protected] Roll Fuchsia Linux SDK from SDNQgVXxHbbd0qsVw... to mPniqXmPpXqMMpM8z... (flutter/flutter#165313) 2025-03-17 [email protected] Roll Dart SDK from 9283d47199b7 to 725172afbc42 (1 revision) (flutter/flutter#165310) 2025-03-17 [email protected] feat(Tooltip): replace the height parameter with constraints (flutter/flutter#163314) 2025-03-17 [email protected] Fix arrowHeadColor breaks differentiation between states (flutter/flutter#165178) 2025-03-17 [email protected] Removes assumption that basis scalar and rounded_scalar match (flutter/flutter#165166) 2025-03-17 [email protected] Roll Skia from 69cf4c2c5db8 to e45207898e60 (1 revision) (flutter/flutter#165300) 2025-03-17 [email protected] Refactor: Move sliders value indicator shape to seperate file (flutter/flutter#162858) 2025-03-17 [email protected] Roll Skia from 3931c31032c7 to 69cf4c2c5db8 (1 revision) (flutter/flutter#165288) 2025-03-17 [email protected] Delete `docs/infra/Infra-Ticket-Queue.md` (flutter/flutter#165258) 2025-03-16 [email protected] Roll Skia from 3413a02d6fc8 to 3931c31032c7 (1 revision) (flutter/flutter#165277) 2025-03-16 [email protected] Roll Fuchsia Linux SDK from LPz5j18JDsms41r3T... to SDNQgVXxHbbd0qsVw... (flutter/flutter#165275) 2025-03-16 [email protected] Roll Dart SDK from 067560bcd521 to 9283d47199b7 (1 revision) (flutter/flutter#165269) 2025-03-16 [email protected] Roll Skia from f124daeb564d to 3413a02d6fc8 (1 revision) (flutter/flutter#165263) 2025-03-15 [email protected] Roll Dart SDK from 40bb66a945e4 to 067560bcd521 (1 revision) (flutter/flutter#165262) 2025-03-15 [email protected] Roll Fuchsia Linux SDK from efdpJgW4DIV6j1mO1... to LPz5j18JDsms41r3T... (flutter/flutter#165252) 2025-03-15 [email protected] Roll Dart SDK from f23d496f0585 to 40bb66a945e4 (1 revision) (flutter/flutter#165250) 2025-03-15 [email protected] Roll Dart SDK from 8814749ec6a4 to f23d496f0585 (1 revision) (flutter/flutter#165246) 2025-03-15 [email protected] Roll Skia from 4568e766ed0a to f124daeb564d (1 revision) (flutter/flutter#165245) 2025-03-15 [email protected] Revert "Prevent explicit roles from merging (#164732)" (flutter/flutter#165222) 2025-03-15 [email protected] Roll Skia from bac6e76abfc7 to 4568e766ed0a (5 revisions) (flutter/flutter#165241) 2025-03-14 [email protected] Roll Dart SDK from a51f1bfa0f6a to 8814749ec6a4 (2 revisions) (flutter/flutter#165227) 2025-03-14 [email protected] Roll Skia from 98b6922deecf to bac6e76abfc7 (5 revisions) (flutter/flutter#165225) 2025-03-14 [email protected] Point ktlint AS docs to the `.editorconfig` that is actually used by ci, instead of making a copy in the README (flutter/flutter#165213) 2025-03-14 [email protected] Add remaining dart fixes for Color deprecations when importing painting.dart (flutter/flutter#162609) 2025-03-14 [email protected] [Accessibility] Add required semantics flags (flutter/flutter#164585) 2025-03-14 [email protected] Roll Skia from f4467ff38f1f to 98b6922deecf (5 revisions) (flutter/flutter#165215) 2025-03-14 [email protected] Convert `BaseFlutterTask` From Groovy to Kotlin (flutter/flutter#163148) 2025-03-14 [email protected] `OverlayPortal.overlayChildLayoutBuilder` (flutter/flutter#164034) 2025-03-14 [email protected] Remove redundant `useMaterial3: true` (flutter/flutter#163376) 2025-03-14 [email protected] Roll Packages from bdb9c96 to d632936 (1 revision) (flutter/flutter#165197) 2025-03-14 [email protected] Changelog updates from 3.29.2 (flutter/flutter#165194) 2025-03-14 [email protected] Roll Dart SDK from 576514b2bfce to a51f1bfa0f6a (1 revision) (flutter/flutter#165191) 2025-03-14 [email protected] Roll Dart SDK from ceb58442306e to 576514b2bfce (2 revisions) (flutter/flutter#165180) 2025-03-14 [email protected] Roll Fuchsia Linux SDK from qXOLczyRJadxMW0PK... to efdpJgW4DIV6j1mO1... (flutter/flutter#165175) 2025-03-14 [email protected] [Impeller] Enable mediatek on API 34+. (flutter/flutter#165156) 2025-03-14 [email protected] Roll Dart SDK from cd06d4ba4fec to ceb58442306e (5 revisions) (flutter/flutter#165159) 2025-03-13 [email protected] [FGP conversion] Port `FlutterExtension` from Groovy to Kotlin (flutter/flutter#165143) 2025-03-13 [email protected] Prevent explicit roles from merging (flutter/flutter#164732) ...
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…8922) Manual roll Flutter from b16430b to 1d954f4 (114 revisions) Manual roll requested by [email protected] flutter/flutter@b16430b...1d954f4 2025-03-17 [email protected] Revert "[skwasm] Dynamic Threading (#164748)" (flutter/flutter#165350) 2025-03-17 [email protected] Roll Skia from fa669e2e6d12 to 52130e5c3b34 (4 revisions) (flutter/flutter#165348) 2025-03-17 [email protected] `OverlayPortal.childLayoutBuilder` should rebuild when `OverlayPortal` rebuilds. (flutter/flutter#165331) 2025-03-17 [email protected] [web][a11y]Delete _childContainerElement (flutter/flutter#163662) 2025-03-17 [email protected] Roll Skia from e45207898e60 to fa669e2e6d12 (8 revisions) (flutter/flutter#165342) 2025-03-17 [email protected] Add documentation for Java test filtering to plugins test document (flutter/flutter#165314) 2025-03-17 [email protected] Roll Fuchsia Linux SDK from SDNQgVXxHbbd0qsVw... to mPniqXmPpXqMMpM8z... (flutter/flutter#165313) 2025-03-17 [email protected] Roll Dart SDK from 9283d47199b7 to 725172afbc42 (1 revision) (flutter/flutter#165310) 2025-03-17 [email protected] feat(Tooltip): replace the height parameter with constraints (flutter/flutter#163314) 2025-03-17 [email protected] Fix arrowHeadColor breaks differentiation between states (flutter/flutter#165178) 2025-03-17 [email protected] Removes assumption that basis scalar and rounded_scalar match (flutter/flutter#165166) 2025-03-17 [email protected] Roll Skia from 69cf4c2c5db8 to e45207898e60 (1 revision) (flutter/flutter#165300) 2025-03-17 [email protected] Refactor: Move sliders value indicator shape to seperate file (flutter/flutter#162858) 2025-03-17 [email protected] Roll Skia from 3931c31032c7 to 69cf4c2c5db8 (1 revision) (flutter/flutter#165288) 2025-03-17 [email protected] Delete `docs/infra/Infra-Ticket-Queue.md` (flutter/flutter#165258) 2025-03-16 [email protected] Roll Skia from 3413a02d6fc8 to 3931c31032c7 (1 revision) (flutter/flutter#165277) 2025-03-16 [email protected] Roll Fuchsia Linux SDK from LPz5j18JDsms41r3T... to SDNQgVXxHbbd0qsVw... (flutter/flutter#165275) 2025-03-16 [email protected] Roll Dart SDK from 067560bcd521 to 9283d47199b7 (1 revision) (flutter/flutter#165269) 2025-03-16 [email protected] Roll Skia from f124daeb564d to 3413a02d6fc8 (1 revision) (flutter/flutter#165263) 2025-03-15 [email protected] Roll Dart SDK from 40bb66a945e4 to 067560bcd521 (1 revision) (flutter/flutter#165262) 2025-03-15 [email protected] Roll Fuchsia Linux SDK from efdpJgW4DIV6j1mO1... to LPz5j18JDsms41r3T... (flutter/flutter#165252) 2025-03-15 [email protected] Roll Dart SDK from f23d496f0585 to 40bb66a945e4 (1 revision) (flutter/flutter#165250) 2025-03-15 [email protected] Roll Dart SDK from 8814749ec6a4 to f23d496f0585 (1 revision) (flutter/flutter#165246) 2025-03-15 [email protected] Roll Skia from 4568e766ed0a to f124daeb564d (1 revision) (flutter/flutter#165245) 2025-03-15 [email protected] Revert "Prevent explicit roles from merging (#164732)" (flutter/flutter#165222) 2025-03-15 [email protected] Roll Skia from bac6e76abfc7 to 4568e766ed0a (5 revisions) (flutter/flutter#165241) 2025-03-14 [email protected] Roll Dart SDK from a51f1bfa0f6a to 8814749ec6a4 (2 revisions) (flutter/flutter#165227) 2025-03-14 [email protected] Roll Skia from 98b6922deecf to bac6e76abfc7 (5 revisions) (flutter/flutter#165225) 2025-03-14 [email protected] Point ktlint AS docs to the `.editorconfig` that is actually used by ci, instead of making a copy in the README (flutter/flutter#165213) 2025-03-14 [email protected] Add remaining dart fixes for Color deprecations when importing painting.dart (flutter/flutter#162609) 2025-03-14 [email protected] [Accessibility] Add required semantics flags (flutter/flutter#164585) 2025-03-14 [email protected] Roll Skia from f4467ff38f1f to 98b6922deecf (5 revisions) (flutter/flutter#165215) 2025-03-14 [email protected] Convert `BaseFlutterTask` From Groovy to Kotlin (flutter/flutter#163148) 2025-03-14 [email protected] `OverlayPortal.overlayChildLayoutBuilder` (flutter/flutter#164034) 2025-03-14 [email protected] Remove redundant `useMaterial3: true` (flutter/flutter#163376) 2025-03-14 [email protected] Roll Packages from 9cc6f37 to ff7724c (1 revision) (flutter/flutter#165197) 2025-03-14 [email protected] Changelog updates from 3.29.2 (flutter/flutter#165194) 2025-03-14 [email protected] Roll Dart SDK from 576514b2bfce to a51f1bfa0f6a (1 revision) (flutter/flutter#165191) 2025-03-14 [email protected] Roll Dart SDK from ceb58442306e to 576514b2bfce (2 revisions) (flutter/flutter#165180) 2025-03-14 [email protected] Roll Fuchsia Linux SDK from qXOLczyRJadxMW0PK... to efdpJgW4DIV6j1mO1... (flutter/flutter#165175) 2025-03-14 [email protected] [Impeller] Enable mediatek on API 34+. (flutter/flutter#165156) 2025-03-14 [email protected] Roll Dart SDK from cd06d4ba4fec to ceb58442306e (5 revisions) (flutter/flutter#165159) 2025-03-13 [email protected] [FGP conversion] Port `FlutterExtension` from Groovy to Kotlin (flutter/flutter#165143) 2025-03-13 [email protected] Prevent explicit roles from merging (flutter/flutter#164732) ...
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…8922) Manual roll Flutter from b16430b to 1d954f4 (114 revisions) Manual roll requested by [email protected] flutter/flutter@b16430b...1d954f4 2025-03-17 [email protected] Revert "[skwasm] Dynamic Threading (#164748)" (flutter/flutter#165350) 2025-03-17 [email protected] Roll Skia from fa669e2e6d12 to 52130e5c3b34 (4 revisions) (flutter/flutter#165348) 2025-03-17 [email protected] `OverlayPortal.childLayoutBuilder` should rebuild when `OverlayPortal` rebuilds. (flutter/flutter#165331) 2025-03-17 [email protected] [web][a11y]Delete _childContainerElement (flutter/flutter#163662) 2025-03-17 [email protected] Roll Skia from e45207898e60 to fa669e2e6d12 (8 revisions) (flutter/flutter#165342) 2025-03-17 [email protected] Add documentation for Java test filtering to plugins test document (flutter/flutter#165314) 2025-03-17 [email protected] Roll Fuchsia Linux SDK from SDNQgVXxHbbd0qsVw... to mPniqXmPpXqMMpM8z... (flutter/flutter#165313) 2025-03-17 [email protected] Roll Dart SDK from 9283d47199b7 to 725172afbc42 (1 revision) (flutter/flutter#165310) 2025-03-17 [email protected] feat(Tooltip): replace the height parameter with constraints (flutter/flutter#163314) 2025-03-17 [email protected] Fix arrowHeadColor breaks differentiation between states (flutter/flutter#165178) 2025-03-17 [email protected] Removes assumption that basis scalar and rounded_scalar match (flutter/flutter#165166) 2025-03-17 [email protected] Roll Skia from 69cf4c2c5db8 to e45207898e60 (1 revision) (flutter/flutter#165300) 2025-03-17 [email protected] Refactor: Move sliders value indicator shape to seperate file (flutter/flutter#162858) 2025-03-17 [email protected] Roll Skia from 3931c31032c7 to 69cf4c2c5db8 (1 revision) (flutter/flutter#165288) 2025-03-17 [email protected] Delete `docs/infra/Infra-Ticket-Queue.md` (flutter/flutter#165258) 2025-03-16 [email protected] Roll Skia from 3413a02d6fc8 to 3931c31032c7 (1 revision) (flutter/flutter#165277) 2025-03-16 [email protected] Roll Fuchsia Linux SDK from LPz5j18JDsms41r3T... to SDNQgVXxHbbd0qsVw... (flutter/flutter#165275) 2025-03-16 [email protected] Roll Dart SDK from 067560bcd521 to 9283d47199b7 (1 revision) (flutter/flutter#165269) 2025-03-16 [email protected] Roll Skia from f124daeb564d to 3413a02d6fc8 (1 revision) (flutter/flutter#165263) 2025-03-15 [email protected] Roll Dart SDK from 40bb66a945e4 to 067560bcd521 (1 revision) (flutter/flutter#165262) 2025-03-15 [email protected] Roll Fuchsia Linux SDK from efdpJgW4DIV6j1mO1... to LPz5j18JDsms41r3T... (flutter/flutter#165252) 2025-03-15 [email protected] Roll Dart SDK from f23d496f0585 to 40bb66a945e4 (1 revision) (flutter/flutter#165250) 2025-03-15 [email protected] Roll Dart SDK from 8814749ec6a4 to f23d496f0585 (1 revision) (flutter/flutter#165246) 2025-03-15 [email protected] Roll Skia from 4568e766ed0a to f124daeb564d (1 revision) (flutter/flutter#165245) 2025-03-15 [email protected] Revert "Prevent explicit roles from merging (#164732)" (flutter/flutter#165222) 2025-03-15 [email protected] Roll Skia from bac6e76abfc7 to 4568e766ed0a (5 revisions) (flutter/flutter#165241) 2025-03-14 [email protected] Roll Dart SDK from a51f1bfa0f6a to 8814749ec6a4 (2 revisions) (flutter/flutter#165227) 2025-03-14 [email protected] Roll Skia from 98b6922deecf to bac6e76abfc7 (5 revisions) (flutter/flutter#165225) 2025-03-14 [email protected] Point ktlint AS docs to the `.editorconfig` that is actually used by ci, instead of making a copy in the README (flutter/flutter#165213) 2025-03-14 [email protected] Add remaining dart fixes for Color deprecations when importing painting.dart (flutter/flutter#162609) 2025-03-14 [email protected] [Accessibility] Add required semantics flags (flutter/flutter#164585) 2025-03-14 [email protected] Roll Skia from f4467ff38f1f to 98b6922deecf (5 revisions) (flutter/flutter#165215) 2025-03-14 [email protected] Convert `BaseFlutterTask` From Groovy to Kotlin (flutter/flutter#163148) 2025-03-14 [email protected] `OverlayPortal.overlayChildLayoutBuilder` (flutter/flutter#164034) 2025-03-14 [email protected] Remove redundant `useMaterial3: true` (flutter/flutter#163376) 2025-03-14 [email protected] Roll Packages from 9cc6f37 to ff7724c (1 revision) (flutter/flutter#165197) 2025-03-14 [email protected] Changelog updates from 3.29.2 (flutter/flutter#165194) 2025-03-14 [email protected] Roll Dart SDK from 576514b2bfce to a51f1bfa0f6a (1 revision) (flutter/flutter#165191) 2025-03-14 [email protected] Roll Dart SDK from ceb58442306e to 576514b2bfce (2 revisions) (flutter/flutter#165180) 2025-03-14 [email protected] Roll Fuchsia Linux SDK from qXOLczyRJadxMW0PK... to efdpJgW4DIV6j1mO1... (flutter/flutter#165175) 2025-03-14 [email protected] [Impeller] Enable mediatek on API 34+. (flutter/flutter#165156) 2025-03-14 [email protected] Roll Dart SDK from cd06d4ba4fec to ceb58442306e (5 revisions) (flutter/flutter#165159) 2025-03-13 [email protected] [FGP conversion] Port `FlutterExtension` from Groovy to Kotlin (flutter/flutter#165143) 2025-03-13 [email protected] Prevent explicit roles from merging (flutter/flutter#164732) ...
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This API allows the widget tree of an `OverlayPortal.overlayChild` to depend on various layout information (e.g. the incoming constraints, or the size of a RenderObject) from another child subtree of `Overlay` that does layout before the `overlayChild`. Most RenderObject subclasses can only access its child's or children's layout info, but not the layout info of its other descendants because of the "relayout boundary" optimization. Such locality makes the layout dependencies easier to reason about but it also makes it difficult to implement certain common UI patterns (see the examples in the description of the [previous PR](flutter#163575)) The API is currently only available on `OverlayPortal` as it is the only Overlay API (AFAIK) that guarantees every render object in a "path" within the render tree has finished doing layout. TODO: polish the API docs and code comments TODO: more tests? TODO: markNeedsLayout should not imply markNeedsPaint in this case (or in layout builders in general). part1: flutter#163575 diff this ... part1 LongCatIsLooong/flutter@OverlayPortal-always-add-to-dirty-list...LongCatIsLooong:flutter:OverlayPortal-paint-transform-builder ## 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]. <!-- 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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This remedies a breaking change from flutter#164034 by restoring RenderConstrainedLayoutBuilder as a typedef of RenderAbstractLayoutBuilderMixin and providing a default implementation for `layoutInfo`. Fixes flutter#167247 ## 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. If you need help, consider asking for advice on the #hackers-new channel on [Discord]. <!-- 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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This API allows the widget tree of an
OverlayPortal.overlayChildto depend on various layout information (e.g. the incoming constraints, or the size of a RenderObject) from another child subtree ofOverlaythat does layout before theoverlayChild.Most RenderObject subclasses can only access its child's or children's layout info, but not the layout info of its other descendants because of the "relayout boundary" optimization. Such locality makes the layout dependencies easier to reason about but it also makes it difficult to implement certain common UI patterns (see the examples in the description of the previous PR)
The API is currently only available on
OverlayPortalas it is the only Overlay API (AFAIK) that guarantees every render object in a "path" within the render tree has finished doing layout.TODO: polish the API docs and code comments
TODO: more tests?
TODO: markNeedsLayout should not imply markNeedsPaint in this case (or in layout builders in general).
part1: #163575
diff this ... part1 LongCatIsLooong/flutter@OverlayPortal-always-add-to-dirty-list...LongCatIsLooong:flutter:OverlayPortal-paint-transform-builder
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.