Support activation with universal links

[kerams]

What does the pull request do?

Implements #17600

What is the current behavior?

IAvaloniaAppDelegate.Activated is raised with ActivatedEventArgs.

What is the updated/expected behavior with this PR?

IAvaloniaAppDelegate.Activated is raised with ProtocolActivatedEventArgs containing the URL that activated the application.

Checklist

• Added unit tests (if possible)?
• Added XML documentation to any related classes?
• Consider submitting a PR to https://github.com/AvaloniaUI/avalonia-docs with user documentation

Breaking changes

Obsoletions / Deprecations

Fixed issues

[avaloniaui-bot]

You can test this PR using the following package version. 11.3.999-cibuild0054347-alpha. (feed url: https://nuget-feed-all.avaloniaui.net/v3/index.json) [PRBUILDID]

[cla-avalonia]

• All contributors have signed the CLA.

[kerams]

Tested the build in my application, and it works OK. I still see the potential problem of cold starts, where subscribing to Activated might be delayed for whatever reason, until after the event has been raised. Not sure there's a good solution to this other than storing the activation information somewhere, so that it can be checked on demand at a later point.

On second thought, it looks like continueUserActivity is called after didFinishLaunchingWithOptions, which invokes CreateAppBuilder, so as long as the user subscribes in Create/CustomizeAppBuilder, this isn't an issue.

[kerams]

@cla-avalonia agree

[maxkatz6]

On second thought, it looks like continueUserActivity is called after didFinishLaunchingWithOptions, which invokes CreateAppBuilder, so as long as the user subscribes in Create/CustomizeAppBuilder, this isn't an issue.

Does it work, if user subscribes in OnFrameworkInitializationCompleted method? It should still be called from the didFinishLaunchingWithOptions.
In our documentation we use OnFrameworkInitializationCompleted as an example for these events.

[kerams]

Going down the stack from

Avalonia/src/Avalonia.Controls/AppBuilder.cs

Line 343 in 3718c10

Instance.OnFrameworkInitializationCompleted();

I end up in didFinishLaunchingWithOptions, so I think we're fine.

[CastelloBrancoTecnologia]

Does this work with macos too ? I am not getting urls on desktop too

[maxkatz6]

This PR only affects iOS backend. For macOS, you typically can use protocol links (i.e. CFBundleURLTypes ones).

[CastelloBrancoTecnologia]

Not working on macos too. Cant get url with protocol links and last version of avalonia