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@mattkae mattkae commented Nov 25, 2024

What's new?

A lot! I completely refactored window.dart and how the multi window reference app works.

This work:

  • decouples the createX methods that reach out to the engine from the dart widgets
  • introduces dart widgets (e.g. RegularWindow) that can be declaratively used to handle the creation and deletion of a window
  • introduce the concept of a WindowController (e.g. RegularWindowController) which enables callers to make changes to a window and listen for changes on a window
  • hides a lot of unnecessary symbols that were being exported in favor of a simpler api

Overall, this is a much needed change! It significantly changed the way that the multi window reference app is done, but for the better in my opinion.

Side note

I have a feeling that it will be a better use of our time to not merge this up in the longer run, but rather to make new PRs off of this. The API has changed so drastically that the newer concepts map very little onto existing PRs.

@hbatagelo
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This looks like a great refactor. I haven't thoroughly reviewed the code yet, but I noticed some potential issues while running the app:

  • The first row in the active window table doesn't seem to be selectable. I think this is fine for now, but it might prevent making the main window the parent of another window (dialog, popup, etc) in the future.
  • The layout of the regular window appears to be from an older version of the reference app. It doesn't display the animated wireframe cube and doesn't show the view size. See the pictures below.

This PR:
Screenshot 2024-12-06 115209

Latest ref app (of course, the "Child Popup" button would be removed for now):
Screenshot 2024-12-06 130209

@mattkae
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mattkae commented Dec 9, 2024

@hbatagelo Fixed those two issues! Good catch

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A few additional suggestions, this time about window.dart.

One small nitpick: the text shown in the regular windows still appears to be from the older reference app (It's fine to update it in a future PR).

@mattkae mattkae requested a review from hbatagelo December 9, 2024 18:55
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Also:

  • Consider adding vector_math: ^2.1.4 as a dependency in pubspec.yaml.
  • Check whether CPP_WRAPPER_SOURCES_WINDOWING is needed in examples/multi_window_ref_app/windows/flutter/CMakeLists.txt. It doesn't seem to work with the 1st engine PR.

@mattkae mattkae merged commit 39de462 into foundation Dec 10, 2024
1 check passed
@mattkae mattkae deleted the foundation-refactor branch December 10, 2024 19:12
hbatagelo pushed a commit that referenced this pull request Feb 19, 2025
The crash indicates that FlutterJNI is returning a nullptr
SurfaceControl.Transaction. That likely indicates that we're trying to
rasterize a frame before the platform view controller is setup.
Potentially a startup race?

At any rate, if the PVC is null that means there is no platform views -
so it should be safe to create a tx on the fly. Interestingly I cannot
repro this locally even on the same device.

```
[2025-02-11 21:50:37.462356] [STDOUT] stdout: [ +173 ms] *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
[2025-02-11 21:50:37.462539] [STDOUT] stdout: [        ] Build fingerprint: 'google/cheetah/cheetah:13/TQ3A.230901.001/10750268:user/release-keys'
[2025-02-11 21:50:37.462564] [STDOUT] stdout: [        ] Revision: 'MP1.0'
[2025-02-11 21:50:37.463914] [STDOUT] stdout: [   +1 ms] ABI: 'arm64'
[2025-02-11 21:50:37.463946] [STDOUT] stdout: [        ] Timestamp: 2025-02-11 21:57:42.183302140-0800
[2025-02-11 21:50:37.463959] [STDOUT] stdout: [        ] Process uptime: 3s
[2025-02-11 21:50:37.464054] [STDOUT] stdout: [        ] Cmdline: dev.benchmarks.platform_views_layout
[2025-02-11 21:50:37.464174] [STDOUT] stdout: [        ] pid: 15185, tid: 15246, name: 1.raster  >>> dev.benchmarks.platform_views_layout <<<
[2025-02-11 21:50:37.464354] [STDOUT] stdout: [        ] uid: 10250
[2025-02-11 21:50:37.464398] [STDOUT] stdout: [        ] tagged_addr_ctrl: 0000000000000001 (PR_TAGGED_ADDR_ENABLE)
[2025-02-11 21:50:37.464440] [STDOUT] stdout: [        ] signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0000000000000000
[2025-02-11 21:50:37.464602] [STDOUT] stdout: [        ] Cause: null pointer dereference
[2025-02-11 21:50:37.464651] [STDOUT] stdout: [        ]     x0  b400007b82ff2e70  x1  000000000000002d  x2  b400007c3309f370  x3  0000007abbcc6a23
[2025-02-11 21:50:37.464745] [STDOUT] stdout: [        ]     x4  0000007a30d286b0  x5  0000007a4f6dd47b  x6  0000000000000000  x7  61686b4b11ff3a78
[2025-02-11 21:50:37.464831] [STDOUT] stdout: [        ]     x8  0000000000000000  x9  1417c2bd490e1f78  x10 0000000000000010  x11 000000000000009c
[2025-02-11 21:50:37.464933] [STDOUT] stdout: [        ]     x12 0000000000000adb  x13 b400007ba2fe9510  x14 0000000000000e6b  x15 b400007ba2fe9510
[2025-02-11 21:50:37.465012] [STDOUT] stdout: [        ]     x16 0000000000000001  x17 0000000000000067  x18 0000007a2f996000  x19 b400007b82ff2e70
[2025-02-11 21:50:37.465082] [STDOUT] stdout: [        ]     x20 000000000000002d  x21 b400007ae3064b60  x22 b400007af30d0fa8  x23 0000000000000001
[2025-02-11 21:50:37.465155] [STDOUT] stdout: [        ]     x24 0000007a30d2a000  x25 b400007b73028fb0  x26 0000007a3a22da20  x27 000000003b9bf6c8
[2025-02-11 21:50:37.465235] [STDOUT] stdout: [        ]     x28 b400007af30d0fa8  x29 b400007ad3022cd0
[2025-02-11 21:50:37.465318] [STDOUT] stdout: [        ]     lr  0000007a3a8c7918  sp  0000007a30d28940  pc  0000000000000000  pst 0000000040001000
[2025-02-11 21:50:37.465401] [STDOUT] stdout: [        ] backtrace:
[2025-02-11 21:50:37.465491] [STDOUT] stdout: [        ]       #00 pc 0000000000000000  <unknown>
[2025-02-11 21:50:37.465596] [STDOUT] stdout: [        ]       #1 pc 000000000088b914  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (flutter::PlatformViewAndroidJNIImpl::createTransaction()+104) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.465688] [STDOUT] stdout: [        ]       #2 pc 000000000087f738  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (std::_fl::__function::__func<flutter::AndroidSurfaceVKImpeller::SetNativeWindow(fml::RefPtr<flutter::AndroidNativeWindow>, std::_fl::shared_ptr<flutter::PlatformViewAndroidJNI> const&)::$_0, std::_fl::allocator<flutter::AndroidSurfaceVKImpeller::SetNativeWindow(fml::RefPtr<flutter::AndroidNativeWindow>, std::_fl::shared_ptr<flutter::PlatformViewAndroidJNI> const&)::$_0>, impeller::android::SurfaceTransaction ()>::operator()()+16) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.465785] [STDOUT] stdout: [        ]       #3 pc 0000000000bdbf1c  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (std::_fl::__function::__func<impeller::AHBSwapchainImplVK::AcquireNextDrawable()::$_0, std::_fl::allocator<impeller::AHBSwapchainImplVK::AcquireNextDrawable()::$_0>, bool ()>::operator()()+1716) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.465874] [STDOUT] stdout: [        ]       #4 pc 0000000000b1d180  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (flutter::SurfaceFrame::Submit()+148) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.465989] [STDOUT] stdout: [        ]       #5 pc 0000000000beb2b4  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (flutter::Rasterizer::DrawToSurfacesUnsafe(flutter::FrameTimingsRecorder&, std::_fl::vector<std::_fl::unique_ptr<flutter::LayerTreeTask, std::_fl::default_delete<flutter::LayerTreeTask> >, std::_fl::allocator<std::_fl::unique_ptr<flutter::LayerTreeTask, std::_fl::default_delete<flutter::LayerTreeTask> > > >)+1284) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466400] [STDOUT] stdout: [        ]       #6 pc 0000000000beac58  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (flutter::Rasterizer::DrawToSurfaces(flutter::FrameTimingsRecorder&, std::_fl::vector<std::_fl::unique_ptr<flutter::LayerTreeTask, std::_fl::default_delete<flutter::LayerTreeTask> >, std::_fl::allocator<std::_fl::unique_ptr<flutter::LayerTreeTask, std::_fl::default_delete<flutter::LayerTreeTask> > > >)+112) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466444] [STDOUT] stdout: [        ]       #7 pc 0000000000bec144  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (std::_fl::__function::__func<flutter::Rasterizer::Draw(std::_fl::shared_ptr<flutter::Pipeline<flutter::FrameItem> > const&)::$_0, std::_fl::allocator<flutter::Rasterizer::Draw(std::_fl::shared_ptr<flutter::Pipeline<flutter::FrameItem> > const&)::$_0>, void (std::_fl::unique_ptr<flutter::FrameItem, std::_fl::default_delete<flutter::FrameItem> >)>::operator()(std::_fl::unique_ptr<flutter::FrameItem, std::_fl::default_delete<flutter::FrameItem> >&&)+192) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466468] [STDOUT] stdout: [        ]       #8 pc 0000000000bebc48  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (flutter::Rasterizer::Draw(std::_fl::shared_ptr<flutter::Pipeline<flutter::FrameItem> > const&)+360) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466521] [STDOUT] stdout: [        ]       #9 pc 0000000000bf9f7c  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (std::_fl::__function::__func<fml::internal::CopyableLambda<flutter::Shell::OnAnimatorDraw(std::_fl::shared_ptr<flutter::Pipeline<flutter::FrameItem> >)::$_0>, std::_fl::allocator<fml::internal::CopyableLambda<flutter::Shell::OnAnimatorDraw(std::_fl::shared_ptr<flutter::Pipeline<flutter::FrameItem> >)::$_0> >, void ()>::operator()()+84) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466543] [STDOUT] stdout: [        ]       #10 pc 00000000008a09ec  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (fml::MessageLoopImpl::RunExpiredTasksNow()+728) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466667] [STDOUT] stdout: [        ]       #11 pc 00000000008a4600  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (fml::MessageLoopAndroid::MessageLoopAndroid()::$_0::__invoke(int, int, void*)+84) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466746] [STDOUT] stdout: [        ]       #12 pc 0000000000011178  /system/lib64/libutils.so (android::Looper::pollOnce(int, int*, int*, void**)+808) (BuildId: 0b4a793fa8045c04066d988c68bac8bb)
[2025-02-11 21:50:37.466784] [STDOUT] stdout: [        ]       #13 pc 00000000000185e4  /system/lib64/libandroid.so (ALooper_pollOnce+100) (BuildId: 682dab490c18361d5d6527bcdd86cdfa)
[2025-02-11 21:50:37.466865] [STDOUT] stdout: [        ]       #14 pc 00000000008a470c  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (fml::MessageLoopAndroid::Run()+28) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466903] [STDOUT] stdout: [        ]       #15 pc 00000000008a283c  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (std::_fl::__function::__func<fml::Thread::Thread(std::_fl::function<void (fml::Thread::ThreadConfig const&)> const&, fml::Thread::ThreadConfig const&)::$_0, std::_fl::allocator<fml::Thread::Thread(std::_fl::function<void (fml::Thread::ThreadConfig const&)> const&, fml::Thread::ThreadConfig const&)::$_0>, void ()>::operator()()+116) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.466943] [STDOUT] stdout: [        ]       #16 pc 00000000008a2670  /data/app/~~u9nRjz4bI1GoKFecw6gtbg==/dev.benchmarks.platform_views_layout-RoPBoOldhc38L7sINb2Vgg==/lib/arm64/libflutter.so (fml::ThreadHandle::ThreadHandle(std::_fl::function<void ()>&&)::$_0::__invoke(void*)+8) (BuildId: 8fab16f9507483301ef418db2c91ed06689696b1)
[2025-02-11 21:50:37.467002] [STDOUT] stdout: [        ]       #17 pc 00000000000c226c  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+204) (BuildId: dc4001c2ef2dfc23467040797a96840c)
[2025-02-11 21:50:37.467058] [STDOUT] stdout: [        ]       #18 pc 0000000000054a30  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64) (BuildId: dc4001c2ef2dfc23467040797a96840c)
[2025-02-11 21:50:37.525275] [STDOUT] stdout: [  +57 ms] 00:00 �[32m+0�[0m�[31m -1�[0m: scrolling performance test (setUpAll) �[1m�[31m[E]�[0m�[0m
```
hbatagelo pushed a commit that referenced this pull request Apr 29, 2025
Fixes error found in rolling to google.

```
[☠] Android toolchain - develop for Android devices (the doctor check crashed)
    ✗ Due to an error, the doctor check did not complete. If the error message
      below is not helpful, please let us know about this issue at
      https://github.com/flutter/flutter/issues.
    ✗ type 'Null' is not a subtype of type 'String' of 'executable'
    • #0      LocalProcessManager.canRun
      (package:process/src/interface/local_process_manager.dart:124)
      #1      getEmulatorVersion
      (package:flutter_tools/src/android/android_workflow.dart:64)
      #2      AndroidValidator.validateImpl
      (package:flutter_tools/src/android/android_workflow.dart:200)
      #3      DoctorValidator.validate
      (package:flutter_tools/src/doctor_validator.dart:58)
      #4      Doctor.startValidatorTasks.<anonymous closure>
      (package:flutter_tools/src/doctor.dart:244)
      #5      asyncGuard.<anonymous closure>
      (package:flutter_tools/src/base/async_guard.dart:109)
      #6      _rootRun (dart:async/zone.dart:1525)
      #7      _CustomZone.run (dart:async/zone.dart:1422)
      #8      _runZoned (dart:async/zone.dart:2033)
      #9      runZonedGuarded (dart:async/zone.dart:2019)
      #10     runZoned (dart:async/zone.dart:1952)
      #11     asyncGuard (package:flutter_tools/src/base/async_guard.dart:106)
      #12     Doctor.startValidatorTasks
      (package:flutter_tools/src/doctor.dart:234)
      #13     Doctor.diagnose (package:flutter_tools/src/doctor.dart:372)
      #14     DoctorCommand.runCommand
      (package:flutter_tools/src/commands/doctor.dart:59)
      #15     FlutterCommand.verifyThenRunCommand
      (package:flutter_tools/src/runner/flutter_command.dart:1897)
      <asynchronous suspension>
      #16     FlutterCommand.run.<anonymous closure>
      (package:flutter_tools/src/runner/flutter_command.dart:1551)
      <asynchronous suspension>
      #17     AppContext.run.<anonymous closure>
      (package:flutter_tools/src/base/context.dart:154)
      <asynchronous suspension>
      #18     CommandRunner.runCommand (package:args/command_runner.dart:212)
      <asynchronous suspension>
      #19     FlutterCommandRunner.runCommand.<anonymous closure>
      (package:flutter_tools/src/runner/flutter_command_runner.dart:501)
      <asynchronous suspension>
      #20     AppContext.run.<anonymous closure>
      (package:flutter_tools/src/base/context.dart:154)
      <asynchronous suspension>
      #21     FlutterCommandRunner.runCommand
      (package:flutter_tools/src/runner/flutter_command_runner.dart:438)
      <asynchronous suspension>
      #22     run.<anonymous closure>.<anonymous closure>
      (package:flutter_tools/runner.dart:98)
      <asynchronous suspension>
      #23     AppContext.run.<anonymous closure>
      (package:flutter_tools/src/base/context.dart:154)
      <asynchronous suspension>
      #24     AppContext.run.<anonymous closure>
      (package:flutter_tools/src/base/context.dart:154)
      <asynchronous suspension>
      #25     run (package:mobile.flutter.cli/flutter_tools.dart:106)
      <asynchronous suspension>
      #26     main (google3:///mobile/flutter/cli/bin/cli_usage_aot.dart:4)
```

## 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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