iOS: Eliminate global in platformviews controller (#56805)

This is a minor refactoring that moves a global bool to a boolean ivar in FlutterPlatformViewsController. The purpose of this variable is simply to avoid the overhead of trying to create backdrop filters if we've ever failed to create one in the past.

Given that this class will only ever have the one instance created and held by per engine with the same duration, and that most apps only ever have one engine, the performance win will be identical for most apps. For the few add-to-app cases with multiple engines either at once or over the course of an app's lifetime, the costs associated with firing up an engine are already a far bigger hit than those being saved by this bool.

Also migrates from C++ style namespace { ... } to Obj-C style static functions. These are entirely equivalent as both restrict symbols to the current translation unit.

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
1 file changed
tree: f0d193f7959934164083f63a516cd1c3c6108b7c
  1. .github/
  2. assets/
  3. benchmarking/
  4. bin/
  5. build/
  6. build_overrides/
  7. ci/
  8. common/
  9. display_list/
  10. docs/
  11. examples/
  12. flow/
  13. flutter_frontend_server/
  14. flutter_vma/
  15. fml/
  16. impeller/
  17. lib/
  18. runtime/
  19. shell/
  20. skia/
  21. sky/
  22. testing/
  23. third_party/
  24. tools/
  25. vulkan/
  26. wasm/
  27. web_sdk/
  28. .ci.yaml
  29. .clang-format
  30. .clang-tidy
  31. .engine-release.version
  32. .git-blame-ignore-revs
  33. .gitattributes
  34. .gitignore
  35. .pylintrc
  36. .style.yapf
  37. analysis_options.yaml
  38. AUTHORS
  39. BUILD.gn
  40. CODEOWNERS
  41. CONTRIBUTING.md
  42. DEPS
  43. Doxyfile
  44. engine.code-workspace
  45. LICENSE
  46. pubspec.yaml
  47. README.md
README.md

Flutter Engine

Flutter CI Status

Flutter is Google's SDK for crafting beautiful, fast user experiences for mobile, web, and desktop from a single codebase. Flutter works with existing code, is used by developers and organizations around the world, and is free and open source.

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