[scenic] Add hit testing to ViewTree Snapshot

- Adds hit testing closures to the ViewTree Snapshot
- Adds a HitTest() method for performing hit tests on a snapshot
- Splits functionality into two files:
  - view_tree_snapshotter for the class that creates snapshots
  - snapshot_types for the independent types

Fixed: 72077, 72069
Test: fx test view_tree_unittests

Change-Id: I3256508494d4f15032c385c0735a148072e06f96
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/504259
Commit-Queue: Mikael Pessa <mikaelpessa@google.com>
Reviewed-by: Josh Gargus <jjosh@google.com>
Reviewed-by: Jaeheon Yi <jaeheon@google.com>
8 files changed
tree: 3e1610b7c20737c3cd7cef96fdfd5631c1083560
  1. boards/
  2. build/
  3. buildtools/
  4. bundles/
  5. docs/
  6. examples/
  7. garnet/
  8. products/
  9. scripts/
  10. sdk/
  11. src/
  12. third_party/
  13. tools/
  14. zircon/
  15. .clang-format
  16. .clang-tidy
  17. .git-blame-ignore-revs
  18. .gitattributes
  19. .gitignore
  20. .gn
  21. .style.yapf
  22. AUTHORS
  23. BUILD.gn
  24. CODE_OF_CONDUCT.md
  25. CONTRIBUTING.md
  26. LICENSE
  27. OWNERS
  28. PATENTS
  29. README.md
  30. rustfmt.toml
README.md

Fuchsia

Pink + Purple == Fuchsia (a new operating system)

What is Fuchsia?

Fuchsia is a modular, capability-based operating system. Fuchsia runs on modern 64-bit Intel and ARM processors.

Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.

Read more about Fuchsia's principles.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See fuchsia.dev.