- 17 Jul, 2023 1 commit
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Michael Goderbauer authored
This change enables Flutter to generate multiple Scenes to be rendered into separate FlutterViews from a single widget tree. Each Scene is described by a separate render tree, which are all associated with the single widget tree. This PR implements the framework-side mechanisms to describe the content to be rendered into multiple views. Separate engine-side changes are necessary to provide these views to the framework and to draw the framework-generated Scene into them. ## Summary of changes The details of this change are described in [flutter.dev/go/multiple-views](https://flutter.dev/go/multiple-views). Below is a high-level summary organized by layers. ### Rendering layer changes * The `RendererBinding` no longer owns a single `renderView`. In fact, it doesn't OWN any `RenderView`s at all anymore. Instead, it offers an API (`addRenderView`/`removeRenderView`) to add and remove `RenderView`s that then will be MANAGED by the binding. The `RenderView` itself is now owned by a higher-level abstraction (e.g. the `RawView` Element of the widgets layer, see below), who is also in charge of adding it to the binding. When added, the binding will interact with the `RenderView` to produce a frame (e.g. by calling `compositeFrame` on it) and to perform hit tests for incoming pointer events. Multiple `RenderView`s can be added to the binding (typically one per `FlutterView`) to produce multiple Scenes. * Instead of owning a single `pipelineOwner`, the `RendererBinding` now owns the root of the `PipelineOwner` tree (exposed as `rootPipelineOwner` on the binding). Each `PipelineOwner` in that tree (except for the root) typically manages its own render tree typically rooted in one of the `RenderView`s mentioned in the previous bullet. During frame production, the binding will instruct each `PipelineOwner` of that tree to flush layout, paint, semantics etc. A higher-level abstraction (e.g. the widgets layer, see below) is in charge of adding `PipelineOwner`s to this tree. * Backwards compatibility: The old `renderView` and `pipelineOwner` properties of the `RendererBinding` are retained, but marked as deprecated. Care has been taken to keep their original behavior for the deprecation period, i.e. if you just call `runApp`, the render tree bootstrapped by this call is rooted in the deprecated `RendererBinding.renderView` and managed by the deprecated `RendererBinding.pipelineOwner`. ### Widgets layer changes * The `WidgetsBinding` no longer attaches the widget tree to an existing render tree. Instead, it bootstraps a stand-alone widget tree that is not backed by a render tree. For this, `RenderObjectToWidgetAdapter` has been replaced by `RootWidget`. * Multiple render trees can be bootstrapped and attached to the widget tree with the help of the `View` widget, which internally is backed by a `RawView` widget. Configured with a `FlutterView` to render into, the `RawView` creates a new `PipelineOwner` and a new `RenderView` for the new render tree. It adds the new `RenderView` to the `RendererBinding` and its `PipelineOwner` to the pipeline owner tree. * The `View` widget can only appear in certain well-defined locations in the widget tree since it bootstraps a new render tree and does not insert a `RenderObject` into an ancestor. However, almost all Elements expect that their children insert `RenderObject`s, otherwise they will not function properly. To produce a good error message when the `View` widget is used in an illegal location, the `debugMustInsertRenderObjectIntoSlot` method has been added to Element, where a child can ask whether a given slot must insert a RenderObject into its ancestor or not. In practice, the `View` widget can be used as a child of the `RootWidget`, inside the `view` slot of the `ViewAnchor` (see below) and inside a `ViewCollection` (see below). In those locations, the `View` widget may be wrapped in other non-RenderObjectWidgets (e.g. InheritedWidgets). * The new `ViewAnchor` can be used to create a side-view inside a parent `View`. The `child` of the `ViewAnchor` widget renders into the parent `View` as usual, but the `view` slot can take on another `View` widget, which has access to all inherited widgets above the `ViewAnchor`. Metaphorically speaking, the view is anchored to the location of the `ViewAnchor` in the widget tree. * The new `ViewCollection` widget allows for multiple sibling views as it takes a list of `View`s as children. It can be used in all the places that accept a `View` widget. ## Google3 As of July 5, 2023 this change passed a TAP global presubmit (TGP) in google3: tap/OCL:544707016:BASE:545809771:1688597935864:e43dd651 ## Note to reviewers This change is big (sorry). I suggest focusing the initial review on the changes inside of `packages/flutter` first. The majority of the changes describe above are implemented in (listed in suggested review order): * `rendering/binding.dart` * `widgets/binding.dart` * `widgets/view.dart` * `widgets/framework.dart` All other changes included in the PR are basically the fallout of what's implemented in those files. Also note that a lot of the lines added in this PR are documentation and tests. I am also very happy to walk reviewers through the code in person or via video call, if that is helpful. I appreciate any feedback. ## Feedback to address before submitting ("TODO")
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- 28 Jul, 2022 1 commit
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Michael Goderbauer authored
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- 20 May, 2021 1 commit
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Dan Field authored
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- 22 Oct, 2020 1 commit
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Michael Goderbauer authored
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- 07 Jan, 2020 1 commit
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Alexandre Ardhuin authored
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- 05 Dec, 2019 1 commit
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Alexandre Ardhuin authored
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- 27 Nov, 2019 1 commit
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Ian Hickson authored
* Update project.pbxproj files to say Flutter rather than Chromium Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright. * Update the copyright notice checker to require a standard notice on all files * Update copyrights on Dart files. (This was a mechanical commit.) * Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine. Some were already marked "The Flutter Authors", not clear why. Their dates have been normalized. Some were missing the blank line after the license. Some were randomly different in trivial ways for no apparent reason (e.g. missing the trailing period). * Clean up the copyrights in non-Dart files. (Manual edits.) Also, make sure templates don't have copyrights. * Fix some more ORGANIZATIONNAMEs
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- 12 Sep, 2018 1 commit
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Alexandre Ardhuin authored
* enable lint unnecessary_new * fix tests * fix tests * fix tests
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- 02 Aug, 2018 1 commit
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Alexandre Ardhuin authored
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- 27 Jul, 2018 1 commit
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Todd Volkert authored
It was causing problems rolling Flutter into Fuchsia
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- 23 Jul, 2018 1 commit
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Alexandre Ardhuin authored
* re-enable lint unnecessary_const * remove trailling whitespaces * remove unnecessary const (after merge)
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- 16 Jul, 2018 2 commits
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Ian Hickson authored
This reverts commit cc1cf13e.
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Alexandre Ardhuin authored
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- 07 Mar, 2018 1 commit
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Josh Soref authored
* spelling: accommodate * spelling: allotted * spelling: anonymous * spelling: artificial * spelling: associated * spelling: asset * spelling: button * spelling: canvas * spelling: compatibility * spelling: coverage * spelling: condition * spelling: decoration * spelling: deferring * spelling: diameter * spelling: direction * spelling: displacement * spelling: dropdown * spelling: needing * spelling: environment * spelling: exited * spelling: expansion * spelling: explore * spelling: families * spelling: horizontal * spelling: increment * spelling: indices * spelling: internationalization * spelling: labrador * spelling: localizations * spelling: midflight * spelling: milliseconds * spelling: minimum * spelling: multiple * spelling: multiplication * spelling: navigator * spelling: overridden * spelling: package * spelling: performance * spelling: platform * spelling: porsche * spelling: position * spelling: preceded * spelling: precede * spelling: precedence * spelling: print * spelling: property * spelling: readily * spelling: reproducibility * spelling: rounded * spelling: scroll * spelling: separate * spelling: separator * spelling: services * spelling: specific * spelling: specify * spelling: synchronously * spelling: through * spelling: timeout * spelling: triangle * spelling: trivial * spelling: unusual * spelling: then * spelling: vertically * spelling: visible * spelling: visited * spelling: voice
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- 17 Nov, 2017 1 commit
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Greg Spencer authored
I got tired of drive-by spelling fixes, so I figured I'd just take care of them all at once. This only corrects errors in the dartdocs, not regular comments, and I skipped any sample code in the dartdocs. It doesn't touch any identifiers in the dartdocs either. No code changes, just comments.
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- 22 Oct, 2017 1 commit
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Alexandre Ardhuin authored
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- 08 Sep, 2017 1 commit
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Adam Barth authored
Notice that the default alignment for Stack needs to know the directionality.
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- 07 Sep, 2017 1 commit
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Ian Hickson authored
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- 12 Apr, 2017 1 commit
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Ian Hickson authored
* Manually fix every use of Point.x and Point.y Some of these were moved to dx/dy, but not all. * Manually convert uses of the old gradient API * Remove old reference to Point. * Mechanical changes I applied the following at the root of the Flutter repository: git ls-files -z | xargs -0 sed -i 's/\bPoint[.]origin\b/Offset.zero/g' git ls-files -z | xargs -0 sed -i 's/\bPoint[.]lerp\b/Offset.lerp/g' git ls-files -z | xargs -0 sed -i 's/\bnew Point\b/new Offset/g' git ls-files -z | xargs -0 sed -i 's/\bconst Point\b/const Offset/g' git ls-files -z | xargs -0 sed -i 's/\bstatic Point /static Offset /g' git ls-files -z | xargs -0 sed -i 's/\bfinal Point /final Offset /g' git ls-files -z | xargs -0 sed -i 's/^\( *\)Point /\1Offset /g' git ls-files -z | xargs -0 sed -i 's/ui[.]Point\b/ui.Offset/g' git ls-files -z | xargs -0 sed -i 's/(Point\b/(Offset/g' git ls-files -z | xargs -0 sed -i 's/\([[{,]\) Point\b/\1 Offset/g' git ls-files -z | xargs -0 sed -i 's/@required Point\b/@required Offset/g' git ls-files -z | xargs -0 sed -i 's/<Point>/<Offset>/g' git ls-files -z | xargs -0 sed -i 's/[.]toOffset()//g' git ls-files -z | xargs -0 sed -i 's/[.]toPoint()//g' git ls-files -z | xargs -0 sed -i 's/\bshow Point, /show /g' git ls-files -z | xargs -0 sed -i 's/\bshow Point;/show Offset;/g' * Mechanical changes - dartdocs I applied the following at the root of the Flutter repository: git ls-files -z | xargs -0 sed -i 's/\ba \[Point\]/an [Offset]/g' git ls-files -z | xargs -0 sed -i 's/\[Point\]/[Offset]/g' * Further improvements and a test * Fix minor errors from rebasing... * Roll engine
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- 07 Apr, 2017 1 commit
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Ian Hickson authored
Aggressively apply the const lint.
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- 21 Mar, 2017 1 commit
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Alexandre Ardhuin authored
* use color.shadeXxx instead of color[Xxx] * remove calls to .shade500 on MaterialColor * remove calls to .shade200 on MaterialAccentColor * fix test
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- 04 Mar, 2017 1 commit
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Chris Bracken authored
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- 14 Mar, 2016 1 commit
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Hixie authored
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- 24 Feb, 2016 1 commit
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Adam Barth authored
Now we just have one TextSpan class that handles both simple strings, trees of children, and styling both. This approach simplifies the interface for most clients. This patch also removes StyledText, which was weakly typed and tricky to use correctly. The replacement is RichText, which is strongly typed and uses TextSpan.
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- 14 Feb, 2016 1 commit
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Adam Barth authored
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- 13 Feb, 2016 1 commit
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Adam Barth authored
Our examples have been growing organically over time. This patch cleans them up to illustrate specific aspects of Flutter.
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