Generated preview much larger than necessary

[markst]

What 🌱

Using new macro with .sizeThatFitsLayout renders preview with the correct size of the view:

#if compiler(>=5.9) && DEBUG
@available(iOS 17.0, *)
#Preview(traits: .sizeThatFitsLayout) {
  EpisodeShareLabel()
    .preferredColorScheme(.dark)
    .background(ShowScreen.Constants.previewBackground)
}
#endif

However when generating snapshot, the rendered output is much larger than necessary:

Proposal 🎉

I'd need to dig into the code to refresh my memory on how the sizing works.
Possibly it's a trouble with UIHostingController and the swift-snapshot-testing framework.

If getting the traits from the Preview macro is difficult, we could introduce another extension on View in order to mark views as explicitly size that fits:

EpisodeShareLabel()
  .preferredColorScheme(.dark)
  .background(ShowScreen.Constants.previewBackground)
  .prefireIgnored()
  .prefireSizeThatFits()

[markst]

This may be somewhat related, if switching my simulator_device from iPad to iPhone, my rendered output is completely different (with no change to view).

  - simulator_device: "iPad13,18"

  - simulator_device: "iPhone17,3"

Though granted this could well be due to the way we render layout on iPad:

  @Environment(\.isPad) private var isPad: Bool

public extension EnvironmentValues {
  /// A `Bool` indicating if the current `deviceIdiom` is `pad`
  var isPad: Bool {
    return deviceIdiom == .pad
  }

I'd assume we're actually better to use horizontalSizeClass rather than than deviceIdiom

[markst]

@BarredEwe oops, I accidentally closed this issue and cannot reopen. Curious to know thoughts, happy to investigate or create a seperate ticket for second comment I mentioned if you think it's relevant.