Media system refactoring

[kekekeks]

General changes:

• animation/layout/render cycle is now managed from a central location
• animations are now throttled if animation/layout/render pass takes longer than a frame which previously caused a soft-freeze with input not being processed
• the public API is trimmed to make sure that we can make other planned changes during the 11.x support cycle

"Changelog":

• IClock is hidden and is planned to be replaced later
• Animator classes are hidden and are planned to be refactored later
• IAnimation members are hidden, it's supposed to be a marker interface for Style.Animations collection now, to start animations manually use Animation.RunAsync
• Sealed several classes in Avalonia.Animation namespace
• Spring class is removed from the public API (it wasn't possible to use it directly in a meaningful way anyway)
• Sealed brushes, transforms, effects and drawings
• Removed separate dispatcher priorities for Layout and Composition, everything now happens from a central place with Render priority (same as WPF)
  • some private "hook" priorities are added for now, those will be removed later
• IRenderLoop is hidden and removed from locator
• IRenderer is hidden (the plan is to remove that concept later)
• • Renderer.Start/Stop exposed as StartRendering/StopRendering on the toplevel (will be on a CompositionTarget/PresentationSource-like type later)
  • Renderer.Diagnistics exposed as RendererDiagnostics (same)
  • Renderer is no longer created by the platform code and is created by TopLevel itself
  • From the user-code hit-testing should be done by VisualExtensions.GetVisual(s)At, which has the same features
  • For unit tests a separate IHitTester interface is added which can be changed for a particular toplevel
• ILayoutManager is hidden
  • LayoutManager.ExecuteLayoutPass() exposed as TopLevel.UpdateLayout()
• Custom animators now have a separate base class that only deals with interpolation

Minor improvements:

• Compositor has a mode that doesn't use DispatcherTimers, useful for unit tests
• Introduced ScopedTestBase that auto-resets the locator when test is finished

[grokys]

Can TransformOperations now be made internal too?

[jmacato]

animation parts lgtm!

[grokys]

Page transitions seem to have stopped working.

[grokys]

TCC working again now. Should fix #11476 I think?

[grokys]

Spoke too soon: ToggleSwitch now seems to be behaving strangely.

[avaloniaui-team]

You can test this PR using the following package version. 11.0.999-cibuild0035621-beta. (feed url: https://pkgs.dev.azure.com/AvaloniaUI/AvaloniaUI/_packaging/avalonia-all/nuget/v3/index.json) [PRBUILDID]

[avaloniaui-team]

You can test this PR using the following package version. 11.0.999-cibuild0035629-beta. (feed url: https://pkgs.dev.azure.com/AvaloniaUI/AvaloniaUI/_packaging/avalonia-all/nuget/v3/index.json) [PRBUILDID]

[danielmayost]

TCC stop working again

[danwalmsley]

TCC stop working again

Just tried it here, and its working, you sure you tested the latest commit?

[danielmayost]

Yes sure, It usually skips the animation and only sometimes does the animation, maybe try pressing back and next a few times to reproduce it.

[avaloniaui-team]

You can test this PR using the following package version. 11.0.999-cibuild0035658-beta. (feed url: https://pkgs.dev.azure.com/AvaloniaUI/AvaloniaUI/_packaging/avalonia-all/nuget/v3/index.json) [PRBUILDID]

[avaloniaui-team]

You can test this PR using the following package version. 11.0.999-cibuild0035674-beta. (feed url: https://pkgs.dev.azure.com/AvaloniaUI/AvaloniaUI/_packaging/avalonia-all/nuget/v3/index.json) [PRBUILDID]

fixed

[avaloniaui-team]

You can test this PR using the following package version. 11.0.999-cibuild0035697-beta. (feed url: https://pkgs.dev.azure.com/AvaloniaUI/AvaloniaUI/_packaging/avalonia-all/nuget/v3/index.json) [PRBUILDID]