1. 17 Jul, 2023 1 commit
    • Michael Goderbauer's avatar
      Stand-alone widget tree with multiple render trees to enable multi-view rendering (#125003) · 6f09064e
      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")
      6f09064e
  2. 28 Jul, 2022 1 commit
  3. 20 May, 2021 1 commit
  4. 22 Oct, 2020 1 commit
  5. 07 Jan, 2020 1 commit
  6. 05 Dec, 2019 1 commit
  7. 27 Nov, 2019 1 commit
    • Ian Hickson's avatar
      License update (#45373) · 449f4a66
      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
      449f4a66
  8. 12 Sep, 2018 1 commit
  9. 02 Aug, 2018 1 commit
  10. 27 Jul, 2018 1 commit
  11. 23 Jul, 2018 1 commit
  12. 16 Jul, 2018 2 commits
  13. 07 Mar, 2018 1 commit
    • Josh Soref's avatar
      Spelling (#15229) · c5a5945e
      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
      c5a5945e
  14. 17 Nov, 2017 1 commit
    • Greg Spencer's avatar
      Fix spelling errors in all the dartdocs. (#13061) · 0259be90
      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.
      0259be90
  15. 22 Oct, 2017 1 commit
  16. 08 Sep, 2017 1 commit
  17. 07 Sep, 2017 1 commit
  18. 12 Apr, 2017 1 commit
    • Ian Hickson's avatar
      Move Point to Offset (#9277) · bf017b79
      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
      bf017b79
  19. 07 Apr, 2017 1 commit
  20. 21 Mar, 2017 1 commit
  21. 04 Mar, 2017 1 commit
  22. 14 Mar, 2016 1 commit
  23. 24 Feb, 2016 1 commit
    • Adam Barth's avatar
      Improve TextSpan · fb4dbf45
      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.
      fb4dbf45
  24. 14 Feb, 2016 1 commit
  25. 13 Feb, 2016 1 commit
    • Adam Barth's avatar
      Clean up the standalone examples · 948ae15c
      Adam Barth authored
      Our examples have been growing organically over time. This patch cleans
      them up to illustrate specific aspects of Flutter.
      948ae15c